{ "name": "MySpaFilter spa filter cartridge cross-reference dataset", "url": "https://myspafilter.com/data/", "publisher": "MySpaFilter", "cite_as": "MySpaFilter. “Spa filter cartridge cross-reference dataset.” MySpaFilter.com, updated 2026-11-10. https://myspafilter.com/data/", "dateModified": "2026-11-10", "count": 173, "note": "Part numbers, dimensions and fittings are transcribed from the cited catalog pages; a row marked unverified lacks a second source or has a conflict. Measure your old cartridge before ordering.", "filters": [ { "brand": "Hot Spring", "model": "4CH-35 cartridge (OEM 31382)", "series": "Hot Spring (Watkins)", "oem_part_numbers": "31382 (formerly 31116)", "oem": "31382", "equivalents": { "unicel": "4CH-35", "pleatco": "PTL35-4", "filbur": "FC-0161" }, "dimensions": { "diameter_in": 4.625, "length_in": 16, "diameter_text": "4-5/8\"", "length_text": "16\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 35 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spring/4ch-35/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Hot Spring", "model": "5CH-37 cartridge (OEM 303279)", "series": "Hot Spring (Watkins)", "oem_part_numbers": "303279", "oem": "303279", "equivalents": { "unicel": "5CH-37", "pleatco": "PFF42TC-P4", "filbur": "FC-2402" }, "dimensions": { "diameter_in": 5.3125, "length_in": 9, "diameter_text": "5-5/16\"", "length_text": "9\"", "top_fitting": "bar handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 38 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spring/5ch-37/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.11 (printed p.7)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Leisure Time Inc.", "where": "Unicel 5CH-37 product page: replaces OEM 303279; Filbur FC-2402; Pleatco PFF42TC-P4", "url": "https://leisuretimeinc.com/products/unicel-5ch-37-filter-cartridge" }, { "source": "Pleatco 2023 Catalog", "where": "Filbur-to-Pleatco cross reference, PDF p.48", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Hot Spring", "model": "C-4326 cartridge (OEM 33521)", "series": "Hot Spring (Watkins)", "oem_part_numbers": "33521", "oem": "33521", "equivalents": { "unicel": "C-4326", "pleatco": "PRB25-IN", "filbur": "FC-2375" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 25 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spring/c-4326/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Hot Spot", "model": "C-4326 cartridge (OEM 33521)", "series": "Hot Spot (Unicel: see also Hot Springs Spas)", "oem_part_numbers": "33521", "oem": "33521", "equivalents": { "unicel": "C-4326", "pleatco": "PRB25-IN", "filbur": "FC-2375" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 25 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spot/c-4326/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Springs Spas section), PDF p.39 (printed p.35); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Hot Spring", "model": "C-5431 cartridge (OEM 31233)", "series": "Hot Spring (Watkins)", "oem_part_numbers": "31233", "oem": "31233", "equivalents": { "unicel": "C-5431", "pleatco": "PKW30V", "filbur": "FC-3910" }, "dimensions": { "diameter_in": 5.125, "length_in": 10.25, "diameter_text": "5-1/8\"", "length_text": "10-1/4\"", "top_fitting": "1-15/16\" / open", "bottom_fitting": "1-15/16\" / open", "square_feet": 30 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "Unicel spec: Model FH/IH (220 volt)", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spring/c-5431/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Hot Spring", "model": "C-6330 cartridge (OEM 31489)", "series": "Hot Spring (Watkins)", "oem_part_numbers": "31489; 71825; 71826", "oem": "31489", "equivalents": { "unicel": "C-6330", "pleatco": "PWK30", "filbur": null }, "dimensions": { "diameter_in": 6, "length_in": 10.5, "diameter_text": "6\"", "length_text": "10-1/2\"", "top_fitting": "1-15/16\" / open", "bottom_fitting": "1-15/16\" / open", "square_feet": 30 }, "status": "verified", "not_in_sources": "no Filbur equivalent found in Filbur catalog; no model/model-year fitment in sources", "notes": "Unicel lists both C-6330 (3 oz media) and C-6430 (4 oz media, 'models dated after 1990') against these OEM numbers", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spring/c-6330/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Hot Spring", "model": "C-6430 cartridge (OEM 31489)", "series": "Hot Spring Highlife (Watkins)", "oem_part_numbers": "31489; 71825; 71826", "oem": "31489", "equivalents": { "unicel": "C-6430", "pleatco": "PWK30-4", "filbur": "FC-3915" }, "dimensions": { "diameter_in": 6, "length_in": 10.5, "diameter_text": "6\"", "length_text": "10-1/2\"", "top_fitting": "1-15/16\" / open", "bottom_fitting": "1-15/16\" / open", "square_feet": 30 }, "status": "verified", "not_in_sources": null, "notes": "4 oz media; Unicel: models dated after 1990. Leisure Time Inc. notes many models take three cartridges and that some use a Tri-X ceramic cartridge with the same footprint instead; Leisure Time Inc.: Use this pleated cartridge only where the spa specifies 71825 or its listed equivalent. Models requiring Tri-X cartridges must use the appropriate Tri-X filter.; Leisure Time Inc.: Replaces compatible 71825 or 31489 pleated cartridges. Models requiring Tri-X cartridges must use the appropriate Tri-X filter. Unicel's 2026 price list (not its spec table, which still prints C-6430 with 4 oz media) says \"C-6430 USE C-6430AM\", the antimicrobial version (30 sq ft, Watkins replacement).", "row_last_changed": "2026-11-03", "model_page_url": "https://myspafilter.com/hot-spring/c-6430/", "fitment": [ { "model": "Highlife Classic F", "years": "1990–2000", "note": null, "source_key": "lt" }, { "model": "Highlife Classic FH", "years": "1990–1996", "note": null, "source_key": "lt" }, { "model": "Highlife Grandee G", "years": "1990–2007", "note": null, "source_key": "lt" }, { "model": "Highlife ILE", "years": "2003", "note": null, "source_key": "lt" }, { "model": "Highlife K", "years": "1990–1996", "note": null, "source_key": "lt" }, { "model": "Highlife Jetsetter J", "years": "1990–2010", "note": null, "source_key": "lt" }, { "model": "Highlife Jetsetter JJ", "years": "2006–2018", "note": null, "source_key": "lt" }, { "model": "Highlife Jetsetter JJN", "years": "2019–2026", "note": null, "source_key": "lt" }, { "model": "Highlife Landmark S", "years": "1995–2003", "note": null, "source_key": "lt" }, { "model": "Highlife Prodigy HN", "years": "2019–2026", "note": null, "source_key": "lt" }, { "model": "Highlife Prodigy H", "years": "1990–2018", "note": null, "source_key": "lt" }, { "model": "Highlife Sovereign ILE", "years": "2002", "note": null, "source_key": "lt" }, { "model": "Highlife Sovereign I", "years": "1990–2010", "note": null, "source_key": "lt" }, { "model": "Highlife Sovereign IH", "years": "1994–1996", "note": null, "source_key": "lt" }, { "model": "Highlife Sovereign II", "years": "2004–2013", "note": null, "source_key": "lt" }, { "model": "Highlife Summit R", "years": "1995–1996", "note": null, "source_key": "lt" }, { "model": "Highlife Triumph TRHN", "years": "2019–2022", "note": null, "source_key": "lt" }, { "model": "Highlife Vanguard V", "years": "2001–2007", "note": null, "source_key": "lt" }, { "model": "Highlife Vanguard VV", "years": "2005–2013", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/hot-spring-highlife-71825-filter-cartridge" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/unicel-c-6430-replacement-filter" } ] }, { "brand": "Hot Spot", "model": "C-6430 cartridge (OEM 31489)", "series": "Hot Spot (Hot Spring family)", "oem_part_numbers": "31489; 71825; 71826", "oem": "31489", "equivalents": { "unicel": "C-6430", "pleatco": "PWK30-4", "filbur": "FC-3915" }, "dimensions": { "diameter_in": 6, "length_in": 10.5, "diameter_text": "6\"", "length_text": "10-1/2\"", "top_fitting": "1-15/16\" / open", "bottom_fitting": "1-15/16\" / open", "square_feet": 30 }, "status": "verified", "not_in_sources": null, "notes": "Unicel lists these OEM numbers under Hot Springs Spas and directs Hot Spot owners there; Hot Spot model fitment is from Leisure Time Inc.; Leisure Time Inc.: Use this pleated cartridge only where the spa specifies 71825 or its listed equivalent. Models requiring Tri-X cartridges must use the appropriate Tri-X filter.; Leisure Time Inc.: Replaces compatible 71825 or 31489 pleated cartridges. Models requiring Tri-X cartridges must use the appropriate Tri-X filter. Unicel's 2026 price list (not its spec table, which still prints C-6430 with 4 oz media) says \"C-6430 USE C-6430AM\", the antimicrobial version (30 sq ft, Watkins replacement).", "row_last_changed": "2026-11-03", "model_page_url": "https://myspafilter.com/hot-spot/c-6430/", "fitment": [ { "model": "Hot Spot Pace", "years": "2020–2026", "note": null, "source_key": "lt" }, { "model": "Hot Spot RE Z", "years": "1998–2002", "note": null, "source_key": "lt" }, { "model": "Hot Spot RLX Z", "years": "1998–2002", "note": null, "source_key": "lt" }, { "model": "Hot Spot SE", "years": "1998–2000", "note": null, "source_key": "lt" }, { "model": "Hot Spot SLX", "years": "1998–2002", "note": null, "source_key": "lt" }, { "model": "Hot Spot SLXtra", "years": "2001–2002", "note": null, "source_key": "lt" }, { "model": "Hot Spot Stride", "years": "2019–2026", "note": null, "source_key": "lt" }, { "model": "Hot Spot SX", "years": "2011–2026", "note": null, "source_key": "lt" }, { "model": "Hot Spot TX", "years": "2011–2026", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Springs Spas section), PDF p.39 (printed p.35); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/hot-spring-highlife-71825-filter-cartridge" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/unicel-c-6430-replacement-filter" } ] }, { "brand": "Solana", "model": "C-6430 cartridge (OEM 31489)", "series": "Solana (Hot Spring family)", "oem_part_numbers": "31489; 71825; 71826", "oem": "31489", "equivalents": { "unicel": "C-6430", "pleatco": "PWK30-4", "filbur": "FC-3915" }, "dimensions": { "diameter_in": 6, "length_in": 10.5, "diameter_text": "6\"", "length_text": "10-1/2\"", "top_fitting": "1-15/16\" / open", "bottom_fitting": "1-15/16\" / open", "square_feet": 30 }, "status": "verified", "not_in_sources": null, "notes": "Unicel does not list Solana separately; Solana model fitment for OEM 71825 is from Leisure Time Inc. Some Hot Spring-family spas use a Tri-X ceramic cartridge with the same footprint instead; Leisure Time Inc.: Use this pleated cartridge only where the spa specifies 71825 or its listed equivalent. Models requiring Tri-X cartridges must use the appropriate Tri-X filter.; Leisure Time Inc.: Replaces compatible 71825 or 31489 pleated cartridges. Models requiring Tri-X cartridges must use the appropriate Tri-X filter. Unicel's 2026 price list (not its spec table, which still prints C-6430 with 4 oz media) says \"C-6430 USE C-6430AM\", the antimicrobial version (30 sq ft, Watkins replacement).", "row_last_changed": "2026-11-03", "model_page_url": "https://myspafilter.com/solana/c-6430/", "fitment": [ { "model": "Solana RX", "years": "2003–2009", "note": null, "source_key": "lt" }, { "model": "Solana SX", "years": "2003–2010", "note": null, "source_key": "lt" }, { "model": "Solana TX", "years": "2003–2010", "note": null, "source_key": "lt" }, { "model": "Solana Tx X", "years": "2000–2002", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Springs Spas section), PDF p.39 (printed p.35); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/hot-spring-highlife-71825-filter-cartridge" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/unicel-c-6430-replacement-filter" } ] }, { "brand": "Caldera", "model": "C-6430 cartridge (OEM 31489)", "series": "Caldera Vacanza (Watkins)", "oem_part_numbers": "31489; 71825; 71826", "oem": "31489", "equivalents": { "unicel": "C-6430", "pleatco": "PWK30-4", "filbur": "FC-3915" }, "dimensions": { "diameter_in": 6, "length_in": 10.5, "diameter_text": "6\"", "length_text": "10-1/2\"", "top_fitting": "1-15/16\" / open", "bottom_fitting": "1-15/16\" / open", "square_feet": 30 }, "status": "verified", "not_in_sources": null, "notes": "Unicel lists OEM 31489 under Hot Springs Spas; the Caldera Vacanza fitment for 31489 is from Leisure Time Inc.; Leisure Time Inc.: Replaces compatible 71825 or 31489 pleated cartridges. Models requiring Tri-X cartridges must use the appropriate Tri-X filter. Unicel's 2026 price list (not its spec table, which still prints C-6430 with 4 oz media) says \"C-6430 USE C-6430AM\", the antimicrobial version (30 sq ft, Watkins replacement).", "row_last_changed": "2026-11-03", "model_page_url": "https://myspafilter.com/caldera/c-6430/", "fitment": [ { "model": "Vacanza Celio", "years": "2019–2026", "note": null, "source_key": "lt" }, { "model": "Vacanza Tarino", "years": "2013–2026", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Caldera section), PDF p.39 (printed p.35); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/caldera-31489-filter-cartridge-30sqft" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/unicel-c-6430-replacement-filter" } ] }, { "brand": "Hot Spring", "model": "C-6350 cartridge (OEM 1642301-1)", "series": "Hot Spring Limelight", "oem_part_numbers": "1642301-1; 78161", "oem": "1642301-1", "equivalents": { "unicel": "C-6350", "pleatco": null, "filbur": null }, "dimensions": { "diameter_in": 6, "length_in": 14, "diameter_text": "6\"", "length_text": "14\"", "top_fitting": "1-15/16\" / open", "bottom_fitting": "1-15/16\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "no Pleatco equivalent in Pleatco 2023 cross reference; no Filbur equivalent found in Filbur catalog", "notes": "Pleatco 2023 lists OEM 1642301-1 as PWK35B (6-3/8\" x 14\", 35 sq ft), which does not match Unicel's 6\" OD / 50 sq ft, so no Pleatco equivalent is shown", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spring/c-6350/", "fitment": [ { "model": "Limelight Beam BMI", "years": "2018–2026", "note": null, "source_key": "lt" }, { "model": "Limelight Beam BMII", "years": "2018–2026", "note": null, "source_key": "lt" }, { "model": "Limelight Flair", "years": "2018–2026", "note": null, "source_key": "lt" }, { "model": "Limelight Flash", "years": "2018–2026", "note": null, "source_key": "lt" }, { "model": "Limelight Pulse", "years": "2018–2026", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring dealer)", "where": "OEM 78161 product page: lists Unicel C-6350 as the aftermarket alternative", "url": "https://leisuretimeinc.com/products/hotspring-limelight-78161-filter-cartridge" } ] }, { "brand": "Hot Spring", "model": "C-6355 cartridge (OEM 1642301-1)", "series": "Hot Spring Limelight", "oem_part_numbers": "1642301-1; 78161", "oem": "1642301-1", "equivalents": { "unicel": "C-6355", "pleatco": "PWK35B", "filbur": null }, "dimensions": { "diameter_in": 6, "length_in": 14, "diameter_text": "6\"", "length_text": "14\"", "top_fitting": "1-15/16\" / open", "bottom_fitting": "1-15/16\" / open", "square_feet": 75 }, "status": "verified", "not_in_sources": "sq ft rating differs between Unicel (75), the dealer listing for 78161 (50) and Pleatco PWK35B (35); no Filbur equivalent found in Filbur catalog", "notes": "Unicel spec note: original is 6-3/8\" OD (Unicel's replacement measures 6\"). Pleatco lists the same OEM number, 1642301-1, for PWK35B at 6-3/8\" x 14\" with 1-15/16\" openings, and the Leisure Time dealer listing for Hot Spring part 78161 gives 1642301-1 as the alternate part number, 14\" long, about 6-1/4\" OD, open 2\" top and bottom. The area ratings differ: Unicel rates C-6355 at 75 sq ft, the dealer lists the factory 78161 at 50 sq ft and Pleatco rates PWK35B at 35 sq ft.", "row_last_changed": "2026-10-25", "model_page_url": "https://myspafilter.com/hot-spring/c-6355/", "fitment": [ { "model": "Limelight Beam BMI", "years": "2018–2026", "note": null, "source_key": "lt" }, { "model": "Limelight Beam BMII", "years": "2018–2026", "note": null, "source_key": "lt" }, { "model": "Limelight Flair", "years": "2018–2026", "note": null, "source_key": "lt" }, { "model": "Limelight Flash", "years": "2018–2026", "note": null, "source_key": "lt" }, { "model": "Limelight Pulse", "years": "2018–2026", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list; Specifications: part 78161, alternate part number 1642301-1, 50 sq ft, length 14 in, OD approx. 6-1/4 in, open 2 in top and bottom", "url": "https://leisuretimeinc.com/products/hotspring-limelight-78161-filter-cartridge" }, { "source": "Pleatco 2023 Catalog", "where": "spec table PDF p.33 (Watkins Hot Spring Spas, 6 3/8 x 14, 1-15/16 / 1-15/16, 35 sq ft, OEM 1642301-1 = PWK35B)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Hot Spring", "model": "C-6433 cartridge (OEM 31250)", "series": "Hot Spring (Watkins)", "oem_part_numbers": "31250", "oem": "31250", "equivalents": { "unicel": "C-6433", "pleatco": "PWK35", "filbur": "FC-3920" }, "dimensions": { "diameter_in": 6, "length_in": 9, "diameter_text": "6\"", "length_text": "9\"", "top_fitting": "1-15/16\" / open", "bottom_fitting": "1-15/16\" / open", "square_feet": 33 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "C-6433 discontinued by Unicel", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spring/c-6433/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Hot Spring", "model": "C-6600 cartridge (OEM 31115)", "series": "Hot Spring (Watkins)", "oem_part_numbers": "31115", "oem": "31115", "equivalents": { "unicel": "C-6600", "pleatco": "PWK25-4/PWK40", "filbur": "FC-3930" }, "dimensions": { "diameter_in": 6.375, "length_in": 11.875, "diameter_text": "6-3/8\"", "length_text": "11-7/8\"", "top_fitting": "3\" / open", "bottom_fitting": "3\" / open", "square_feet": 45 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spring/c-6600/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.13 (printed p.9)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Hot Spring", "model": "C-8465 cartridge (OEM 31114)", "series": "Hot Spring Limelight / Tiger River (Watkins)", "oem_part_numbers": "31114; 71827; 71828", "oem": "31114", "equivalents": { "unicel": "C-8465", "pleatco": "PWK65", "filbur": "FC-3960" }, "dimensions": { "diameter_in": 8.5, "length_in": 10.5, "diameter_text": "8-1/2\"", "length_text": "10-1/2\"", "top_fitting": "3\" / open", "bottom_fitting": "3\" / open", "square_feet": 65 }, "status": "verified", "not_in_sources": null, "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spring/c-8465/", "fitment": [ { "model": "Limelight Bolt", "years": "2012–2017", "note": null, "source_key": "lt" }, { "model": "Limelight Flair", "years": "2008–2017", "note": null, "source_key": "lt" }, { "model": "Limelight Glow", "years": "2008–2017", "note": null, "source_key": "lt" }, { "model": "Limelight Pulse", "years": "2008–2017", "note": null, "source_key": "lt" }, { "model": "Tiger River Bengal M", "years": "1997–2010", "note": null, "source_key": "lt" }, { "model": "Tiger River Bengal MM", "years": "2005–2010", "note": null, "source_key": "lt" }, { "model": "Tiger River Caspian CHP", "years": "2004–2010", "note": null, "source_key": "lt" }, { "model": "Tiger River Caspian CPN", "years": "2003", "note": null, "source_key": "lt" }, { "model": "Tiger River Khyber L", "years": "1994–1996", "note": null, "source_key": "lt" }, { "model": "Tiger River Manora MH", "years": "1996", "note": null, "source_key": "lt" }, { "model": "Tiger River Manora M", "years": "1992–1996", "note": null, "source_key": "lt" }, { "model": "Tiger River Siberian L", "years": "1997–2004", "note": null, "source_key": "lt" }, { "model": "Tiger River Sumatran N", "years": "1997–2010", "note": null, "source_key": "lt" }, { "model": "Tiger River Tondi N", "years": "1992–1994", "note": null, "source_key": "lt" }, { "model": "Tiger River Tondi PH", "years": "1996", "note": null, "source_key": "lt" }, { "model": "Tiger River Tondi P", "years": "1995–1996", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.21 (printed p.17)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/hot-spring-71827-filter-cartridge" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/unicel-c-8465-replacement-filter" } ] }, { "brand": "Hot Spot", "model": "C-8465 cartridge (OEM 31114)", "series": "Hot Spot (Hot Spring family)", "oem_part_numbers": "31114; 71827; 71828", "oem": "31114", "equivalents": { "unicel": "C-8465", "pleatco": "PWK65", "filbur": "FC-3960" }, "dimensions": { "diameter_in": 8.5, "length_in": 10.5, "diameter_text": "8-1/2\"", "length_text": "10-1/2\"", "top_fitting": "3\" / open", "bottom_fitting": "3\" / open", "square_feet": 65 }, "status": "verified", "not_in_sources": null, "notes": "Unicel lists these OEM numbers under Hot Springs Spas; Hot Spot model fitment is from Leisure Time Inc.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spot/c-8465/", "fitment": [ { "model": "Hot Spot La Palma", "years": "2008–2009", "note": null, "source_key": "lt" }, { "model": "Hot Spot Relay", "years": "2010–2026", "note": null, "source_key": "lt" }, { "model": "Hot Spot Rhythm", "years": "2011–2026", "note": null, "source_key": "lt" }, { "model": "Hot Spot Tempo", "years": "2010–2019", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Springs Spas section), PDF p.39 (printed p.35); spec table PDF p.21 (printed p.17)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/hot-spring-71827-filter-cartridge" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/unicel-c-8465-replacement-filter" } ] }, { "brand": "Hot Spot", "model": "C-7350 cartridge (OEM 1019401)", "series": "Hot Spot (Hot Spring family)", "oem_part_numbers": "1019401; 73532", "oem": "1019401", "equivalents": { "unicel": "C-7350", "pleatco": "PCD50N", "filbur": "FC-3963" }, "dimensions": { "diameter_in": 7, "length_in": 10.75, "diameter_text": "7\"", "length_text": "10-3/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2-11/16\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": null, "notes": "Unicel lists these OEM numbers under Caldera Spas; the Hot Spot Sorrento fitment is from Leisure Time Inc.; Leisure Time Inc.: For a 2024 Makena, confirm the spa serial number before ordering. Other Makena years use a different cartridge.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spot/c-7350/", "fitment": [ { "model": "Hot Spot Sorrento", "years": "2003–2009", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Springs Spas section), PDF p.30 (printed p.26); spec table PDF p.15 (printed p.11)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Caldera, printed p.30 (PDF p.16)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/unicel-c-7350-filter-cartridge" } ] }, { "brand": "Hot Spot", "model": "C-7375 cartridge (OEM 1019301)", "series": "Hot Spot (Hot Spring family)", "oem_part_numbers": "1019301; 73531", "oem": "1019301", "equivalents": { "unicel": "C-7375", "pleatco": "PCD75N", "filbur": "FC-3964" }, "dimensions": { "diameter_in": 7, "length_in": 14.75, "diameter_text": "7\"", "length_text": "14-3/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2-11/16\" / open", "square_feet": 75 }, "status": "verified", "not_in_sources": null, "notes": "Unicel lists these OEM numbers under Caldera Spas; the Hot Spot Mallorca fitment is from Leisure Time Inc.; Leisure Time Inc.: For a 2004 Hawaiian HAA or a 2024 Makena, check the spa serial number before ordering.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/hot-spot/c-7375/", "fitment": [ { "model": "Hot Spot Mallorca", "years": "2003–2009", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Hot Springs Spas section), PDF p.30 (printed p.26); spec table PDF p.16 (printed p.12)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Caldera, printed p.30 (PDF p.16)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/unicel-c-7375-filter-cartridge" } ] }, { "brand": "Caldera", "model": "C-4335 cartridge (OEM 74148)", "series": "Caldera (Watkins)", "oem_part_numbers": "74148", "oem": "74148", "equivalents": { "unicel": "C-4335", "pleatco": "PRB35-IN", "filbur": "FC-2385" }, "dimensions": { "diameter_in": 4.9375, "length_in": 9.25, "diameter_text": "4-15/16\"", "length_text": "9-1/4\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 35 }, "status": "verified", "not_in_sources": null, "notes": "Leisure Time Inc.: For a 2019 Aventine, check the spa serial number to confirm the filter.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/caldera/c-4335/", "fitment": [ { "model": "Vacanza Aventine", "years": "2010–2026", "note": null, "source_key": "lt" }, { "model": "Highland Aventine AVH", "years": "2006–2009", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Caldera section), PDF p.30 (printed p.26); spec table PDF p.8 (printed p.4)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.64 (PDF p.33)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Caldera dealer)", "where": "OEM 74148 product page: cross-reference C-4335", "url": "https://leisuretimeinc.com/products/caldera-74148-filter-cartridge" } ] }, { "brand": "Caldera", "model": "C-4950 cartridge (OEM 302005)", "series": "Caldera (Watkins)", "oem_part_numbers": "302005; 73533", "oem": "302005", "equivalents": { "unicel": "C-4950", "pleatco": "PRB50-IN", "filbur": "FC-2390" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "302005 is listed only by Unicel; no model-year fitment in sources", "notes": "In the Unicel layout, 73533 and 76076 sit on the lines below 302005. A Spa Parts Depot listing confirms Caldera 73533 as a 4-15/16\" x 13-5/16\" 50 sq ft cartridge with a 2-1/8\" hole top and bottom that “also replaces C-4950”, for the Caldera Oasis, Oasis II and San Gabriel. 76076 is a different cartridge: a Watkins dealer lists it as 10\" tall and 5-1/4\" across with a 2-1/8\" centre hole (Hot Spot Sprint/Dash and Caldera Vacanza Lina/Cima), so it is not shown as an OEM number for C-4950.", "row_last_changed": "2026-10-25", "model_page_url": "https://myspafilter.com/caldera/c-4950/", "fitment": [ { "model": "Caldera Oasis", "years": null, "note": null, "source_key": "spd" }, { "model": "Caldera Oasis II", "years": null, "note": null, "source_key": "spd" }, { "model": "Caldera San Gabriel", "years": null, "note": null, "source_key": "spd" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Caldera section), PDF p.30 (printed p.26); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.64 (PDF p.33)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Spa Parts Depot (retailer)", "where": "Caldera 73533: 4-15/16\" dia x 13-5/16\" tall, 2-1/8\" hole top and bottom, 50 sq ft, “Also Replaces C-4950”; for Caldera Oasis, Oasis II, San Gabriel", "url": "https://spapartsdepot.com/caldera-oasis-oasis-ii-san-gabriel-50-sq-ft-filter-73533/" }, { "source": "Spring Dance Hot Tubs (Watkins dealer)", "where": "76076: 10\" tall, 5-1/4\" diameter, 2-1/8\" centre hole; Hot Spot Sprint/Dash, Caldera Vacanza Lina/Cima (a different cartridge)", "url": "https://store.springdancehottubs.com/products/76076-caldera-hot-spring-50-sq-ft-filter" } ] }, { "brand": "Caldera", "model": "C-7350 cartridge (OEM 1019401)", "series": "Caldera (Watkins) new style", "oem_part_numbers": "1019401; 73532", "oem": "1019401", "equivalents": { "unicel": "C-7350", "pleatco": "PCD50N", "filbur": "FC-3963" }, "dimensions": { "diameter_in": 7, "length_in": 10.75, "diameter_text": "7\"", "length_text": "10-3/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2-11/16\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": null, "notes": "Leisure Time Inc.: For a 2024 Makena, confirm the spa serial number before ordering. Other Makena years use a different cartridge.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/caldera/c-7350/", "fitment": [ { "model": "Utopia Ravello", "years": "2022–2026", "note": null, "source_key": "lt" }, { "model": "Paradise Kauai", "years": "2000–2026", "note": null, "source_key": "lt" }, { "model": "Paradise Martinique", "years": "2000–2026", "note": null, "source_key": "lt" }, { "model": "Paradise Makena", "years": "2024", "note": null, "source_key": "lt" }, { "model": "Highland Cascade", "years": "2000", "note": null, "source_key": "lt" }, { "model": "Highland Cumberland", "years": "2002–2009", "note": null, "source_key": "lt" }, { "model": "Highland San Gabriel", "years": "2008–2009", "note": null, "source_key": "lt" }, { "model": "Highland Teton", "years": "2000", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Caldera section), PDF p.30 (printed p.26); spec table PDF p.15 (printed p.11)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Caldera, printed p.30 (PDF p.16)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/caldera-73532-filter-cartridge" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/unicel-c-7350-filter-cartridge" } ] }, { "brand": "Caldera", "model": "C-7375 cartridge (OEM 1019301)", "series": "Caldera (Watkins) new style", "oem_part_numbers": "1019301; 73531", "oem": "1019301", "equivalents": { "unicel": "C-7375", "pleatco": "PCD75N", "filbur": "FC-3964" }, "dimensions": { "diameter_in": 7, "length_in": 14.75, "diameter_text": "7\"", "length_text": "14-3/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2-11/16\" / open", "square_feet": 75 }, "status": "verified", "not_in_sources": null, "notes": "Unicel lists 75/100 sq ft against this OEM; Leisure Time Inc.: For a 2004 Hawaiian HAA or a 2024 Makena, check the spa serial number before ordering.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/caldera/c-7375/", "fitment": [ { "model": "Utopia Geneva GEB", "years": "2000–2004", "note": null, "source_key": "lt" }, { "model": "Utopia Hawaiian HAB", "years": "2001–2002", "note": null, "source_key": "lt" }, { "model": "Utopia Niagara NIB", "years": "2000–2004", "note": null, "source_key": "lt" }, { "model": "Utopia Provence", "years": "2018–2021", "note": null, "source_key": "lt" }, { "model": "Utopia Tahitian", "years": "2000–2004", "note": null, "source_key": "lt" }, { "model": "Paradise Geneva GEA", "years": "2000–2004", "note": null, "source_key": "lt" }, { "model": "Paradise Hawaiian HAA", "years": "2000–2010", "note": null, "source_key": "lt" }, { "model": "Paradise Makena MAA", "years": "2013–2023, 2025–2026", "note": null, "source_key": "lt" }, { "model": "Paradise Moorea", "years": "2006–2010", "note": null, "source_key": "lt" }, { "model": "Paradise Niagara NIA", "years": "2000–2002", "note": null, "source_key": "lt" }, { "model": "Paradise Reunion", "years": "2019–2026", "note": null, "source_key": "lt" }, { "model": "Paradise Salina", "years": "2011–2026", "note": null, "source_key": "lt" }, { "model": "Paradise Seychelles", "years": "2019–2026", "note": null, "source_key": "lt" }, { "model": "Paradise Tahitian TAA", "years": "2000–2005", "note": null, "source_key": "lt" }, { "model": "Highland Cascade", "years": "2001–2003", "note": null, "source_key": "lt" }, { "model": "Highland Olympia", "years": "2000–2009", "note": null, "source_key": "lt" }, { "model": "Highland Palomar", "years": "2004–2005", "note": null, "source_key": "lt" }, { "model": "Highland Teton", "years": "2001", "note": null, "source_key": "lt" }, { "model": "Aquatic Melodies Aspire", "years": "2004", "note": null, "source_key": "lt" }, { "model": "Aquatic Melodies Elation", "years": "2003–2004", "note": null, "source_key": "lt" }, { "model": "C-Series C30", "years": "2006–2009", "note": null, "source_key": "lt" }, { "model": "C-Series C30S", "years": "2006–2009", "note": null, "source_key": "lt" }, { "model": "C-Series C45", "years": "2006–2009", "note": null, "source_key": "lt" }, { "model": "C-Series C45S", "years": "2006–2009", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Caldera section), PDF p.30 (printed p.26); spec table PDF p.16 (printed p.12)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Caldera, printed p.30 (PDF p.16)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/caldera-77813-filter-cartridge" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/unicel-c-7375-filter-cartridge" } ] }, { "brand": "Caldera", "model": "C-7451 cartridge (OEM 033016)", "series": "Caldera (Watkins)", "oem_part_numbers": "033016", "oem": "033016", "equivalents": { "unicel": "C-7451", "pleatco": "PCD50", "filbur": "FC-3084" }, "dimensions": { "diameter_in": 7, "length_in": 10.75, "diameter_text": "7\"", "length_text": "10-3/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2” male slip fitting", "square_feet": 50 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "Unicel: C-7350 can also be used", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/caldera/c-7451/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Caldera section), PDF p.30 (printed p.26); spec table PDF p.15 (printed p.11)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Caldera, printed p.30 (PDF p.16)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Caldera", "model": "C-7479 cartridge (OEM 033017)", "series": "Caldera (Watkins)", "oem_part_numbers": "033017", "oem": "033017", "equivalents": { "unicel": "C-7479", "pleatco": "PCD75", "filbur": "FC-3085" }, "dimensions": { "diameter_in": 7, "length_in": 14.75, "diameter_text": "7\"", "length_text": "14-3/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2” male slip fitting", "square_feet": 75 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "Unicel: C-7375 can also be used", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/caldera/c-7479/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Caldera section), PDF p.30 (printed p.26); spec table PDF p.15 (printed p.11)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Caldera, printed p.30 (PDF p.16)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc.", "where": "Unicel C-7479 product page: replaces OEM 033017; Pleatco PCD75; Filbur FC-3085", "url": "https://leisuretimeinc.com/products/unicel-c-7479-filter-cartridge" } ] }, { "brand": "Caldera", "model": "C-8300 cartridge (OEM 74817)", "series": "Caldera Utopia (Watkins)", "oem_part_numbers": "74817", "oem": "74817", "equivalents": { "unicel": "C-8300", "pleatco": null, "filbur": "FC-3966" }, "dimensions": { "diameter_in": 8, "length_in": 16.5, "diameter_text": "8\"", "length_text": "16-1/2\"", "top_fitting": "3-1/8\" / open w/ molded gasket", "bottom_fitting": "3-1/8\" / open w/ molded gasket", "square_feet": 100 }, "status": "verified", "not_in_sources": "no Pleatco equivalent in Pleatco 2023 cross reference", "notes": "Leisure Time Inc. also lists Hot Spring 77004 and Pleatco PWK100 for this cartridge; PWK100 is not in the Pleatco 2023 spec tables, so it is not shown as an equivalent; Leisure Time Inc.: For 2014 Cantabria spas, confirm the production quarter. Q3–Q4 production uses 73722.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/caldera/c-8300/", "fitment": [ { "model": "Utopia Cantabria", "years": "2009–Q2 2014", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Caldera section), PDF p.30 (printed p.26); spec table PDF p.20 (printed p.16)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Leisure Time Inc. (Caldera dealer)", "where": "Unicel C-8300 product page: replaces Caldera 74817; Filbur FC-3966", "url": "https://leisuretimeinc.com/products/unicel-c-8300-filter-cartridge" }, { "source": "Filbur Catalog & Reference Guide", "where": "Caldera section, printed p.30 (PDF p.16), lists FC-3966 at 8\" x 16-1/2\", 100 sq ft with no OEM number", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/caldera-74817-filter-cartridge" } ] }, { "brand": "Caldera", "model": "C-8399 cartridge (OEM 1039607)", "series": "Caldera (Watkins)", "oem_part_numbers": "1039607; 73722", "oem": "1039607", "equivalents": { "unicel": "C-8399", "pleatco": "PCD100W", "filbur": "FC-3965" }, "dimensions": { "diameter_in": 8, "length_in": 16.5, "diameter_text": "8\"", "length_text": "16-1/2\"", "top_fitting": "semi-circular handle", "bottom_fitting": "3-5/8\" / open w/ lip seal", "square_feet": 100 }, "status": "verified", "not_in_sources": null, "notes": "Leisure Time Inc.: For 2014 Cantabria spas, confirm the production quarter. This cartridge is for Q3–Q4 production; Q1–Q2 uses 74817.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/caldera/c-8399/", "fitment": [ { "model": "Utopia Cantabria", "years": "Q3 2014–2026", "note": null, "source_key": "lt" }, { "model": "Utopia Elation", "years": "2009–2010", "note": null, "source_key": "lt" }, { "model": "Utopia Florence", "years": "2018–2026", "note": null, "source_key": "lt" }, { "model": "Utopia Geneva GEB", "years": "2005–2026", "note": null, "source_key": "lt" }, { "model": "Utopia Niagara NIB", "years": "2005–2026", "note": null, "source_key": "lt" }, { "model": "Utopia Tahitian", "years": "2005–2026", "note": null, "source_key": "lt" }, { "model": "Aquatic Melodies Aspire", "years": "2005–2008", "note": null, "source_key": "lt" }, { "model": "Aquatic Melodies Elation", "years": "2005–2008", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Caldera section), PDF p.30 (printed p.26); spec table PDF p.20 (printed p.16)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Caldera, printed p.30 (PDF p.16)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/caldera-73722-filter-cartridge" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/unicel-c-8399-filter-cartridge" } ] }, { "brand": "Caldera", "model": "C-8465 cartridge (OEM 76136)", "series": "Caldera Vacanza (Watkins)", "oem_part_numbers": "76136", "oem": "76136", "equivalents": { "unicel": "C-8465", "pleatco": "PWK65", "filbur": "FC-3960" }, "dimensions": { "diameter_in": 8.5, "length_in": 10.5, "diameter_text": "8-1/2\"", "length_text": "10-1/2\"", "top_fitting": "3\" / open", "bottom_fitting": "3\" / open", "square_feet": 65 }, "status": "verified", "not_in_sources": null, "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/caldera/c-8465/", "fitment": [ { "model": "Vacanza Marino", "years": "2010–2026", "note": null, "source_key": "lt" }, { "model": "Vacanza Palatino", "years": "2010–2026", "note": null, "source_key": "lt" }, { "model": "Vacanza Vanto", "years": "2011–2026", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Caldera section), PDF p.30 (printed p.26); spec table PDF p.21 (printed p.17)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.65 (PDF p.33)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/caldera-77815-filter-cartridge" }, { "source": "Leisure Time Inc. (Hot Spring/Caldera dealer)", "where": "Compatibility section: model and model-year list", "url": "https://leisuretimeinc.com/products/unicel-c-8465-replacement-filter" } ] }, { "brand": "Jacuzzi", "model": "C-5625 cartridge (OEM 42-2891-08-R)", "series": "Jacuzzi CFR-25 / CFT-25 (in-line)", "oem_part_numbers": "42-2891-08-R (formerly 42-2763-03)", "oem": "42-2891-08-R", "equivalents": { "unicel": "C-5625", "pleatco": "PJ25-IN-4", "filbur": "FC-1425" }, "dimensions": { "diameter_in": 5, "length_in": 13.3125, "diameter_text": "5\"", "length_text": "13-5/16\"", "top_fitting": "2-3/8\" / open", "bottom_fitting": "2-3/8\" / open", "square_feet": 25 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/jacuzzi/c-5625/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Jacuzzi section), PDF p.41 (printed p.37); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Jacuzzi Whirlpool Spas, printed p.39 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Jacuzzi", "model": "C-5635 cartridge (OEM 42-3533-00-R)", "series": "Jacuzzi CFR-37 (in-line)", "oem_part_numbers": "42-3533-00-R", "oem": "42-3533-00-R", "equivalents": { "unicel": "C-5635", "pleatco": "PJ37-IN-4", "filbur": "FC-1437" }, "dimensions": { "diameter_in": 5, "length_in": 13.3125, "diameter_text": "5\"", "length_text": "13-5/16\"", "top_fitting": "2-3/8\" / open", "bottom_fitting": "2-3/8\" / open", "square_feet": 37 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/jacuzzi/c-5635/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Jacuzzi section), PDF p.41 (printed p.37); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Jacuzzi Whirlpool Spas, printed p.39 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Jacuzzi", "model": "C-7304 cartridge (OEM 42-3724-09)", "series": "Jacuzzi CE Filter", "oem_part_numbers": "42-3724-09", "oem": "42-3724-09", "equivalents": { "unicel": "C-7304", "pleatco": "PJB40", "filbur": "FC-1450" }, "dimensions": { "diameter_in": 7, "length_in": 13.6875, "diameter_text": "7\"", "length_text": "13-11/16\"", "top_fitting": "3\" / open w/ step", "bottom_fitting": "3\" / open w/ step", "square_feet": 40 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/jacuzzi/c-7304/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Jacuzzi section), PDF p.41 (printed p.37); spec table PDF p.15 (printed p.11)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Jacuzzi Whirlpool Spas, printed p.39 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Jacuzzi", "model": "C-7306 cartridge (OEM 42-3725-08)", "series": "Jacuzzi CE Filter", "oem_part_numbers": "42-3725-08", "oem": "42-3725-08", "equivalents": { "unicel": "C-7306", "pleatco": "PJB60", "filbur": "FC-1455" }, "dimensions": { "diameter_in": 7, "length_in": 17.6875, "diameter_text": "7\"", "length_text": "17-11/16\"", "top_fitting": "3\" / open w/ step", "bottom_fitting": "3\" / open w/ step", "square_feet": 60 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/jacuzzi/c-7306/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Jacuzzi section), PDF p.41 (printed p.37); spec table PDF p.16 (printed p.12)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Jacuzzi Whirlpool Spas, printed p.39 (PDF p.20)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Jacuzzi", "model": "4CH-934 cartridge (OEM 2540-387)", "series": "Jacuzzi Premium", "oem_part_numbers": "2540-387", "oem": "2540-387", "equivalents": { "unicel": "4CH-934", "pleatco": null, "filbur": "FC-2761" }, "dimensions": { "diameter_in": 4.625, "length_in": 12.5, "diameter_text": "4-5/8\"", "length_text": "12-1/2\"", "top_fitting": "molded cone handle", "bottom_fitting": "2\" SAE thread", "square_feet": 35 }, "status": "verified", "not_in_sources": "no Pleatco equivalent in Pleatco 2023 cross reference; no model/model-year fitment in sources", "notes": "Filbur lists OEM 2540-387 as FC-2761 (4-5/8\" x 12-1/2\") but prints \"3\" in its sq ft column and gives no Unicel/Pleatco cross-reference", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/jacuzzi/4ch-934/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Jacuzzi section), PDF p.42 (printed p.38); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Sundance (J-400 Cartridge 12.5\"), printed p.51 (PDF p.26)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Jacuzzi", "model": "5CH-402 cartridge (OEM 6540-723)", "series": "Jacuzzi Premium / Del Sol Redondo, Hermosa", "oem_part_numbers": "6540-723", "oem": "6540-723", "equivalents": { "unicel": "5CH-402", "pleatco": "PJW40SC-F2M", "filbur": "FC-2811" }, "dimensions": { "diameter_in": 5.1875, "length_in": 10.75, "diameter_text": "5-3/16\"", "length_text": "10-3/4\"", "top_fitting": "bar handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 50 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "OEM original 11\" OAL, 5-1/2\" OD", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/jacuzzi/5ch-402/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Jacuzzi section), PDF p.42 (printed p.38); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Jacuzzi Premium Spas, printed p.40 (PDF p.21)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Jacuzzi", "model": "6CH-945 cartridge (OEM 6540-498)", "series": "Jacuzzi Premium J460 Series", "oem_part_numbers": "6540-498", "oem": "6540-498", "equivalents": { "unicel": "6CH-945", "pleatco": "PJP45-F2S", "filbur": "FC-2717" }, "dimensions": { "diameter_in": 6, "length_in": 13.5, "diameter_text": "6\"", "length_text": "13-1/2\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2\" SAE thread", "square_feet": 45 }, "status": "verified", "not_in_sources": null, "notes": "Leisure Time Inc. warns that J-460 spas used several non-interchangeable cartridges; confirm size and thread against your old filter", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/jacuzzi/6ch-945/", "fitment": [ { "model": "J460 Series", "years": null, "note": null, "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Jacuzzi section), PDF p.42 (printed p.38); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Jacuzzi Premium Spas, printed p.40 (PDF p.21)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc.", "where": "Unicel 6CH-945 product page: replaces 6540-498; Pleatco PJP45-F2S; Filbur FC-2717; fits J-460 2006 and later", "url": "https://leisuretimeinc.com/products/unicel-6ch-945-filter-cartridge" } ] }, { "brand": "Jacuzzi", "model": "6CH-959 cartridge (OEM 2000-286)", "series": "Jacuzzi Premium J400 Series", "oem_part_numbers": "2000-286; 20086-001; 2540-383", "oem": "2000-286", "equivalents": { "unicel": "6CH-959", "pleatco": null, "filbur": "FC-2716" }, "dimensions": { "diameter_in": 6, "length_in": 17.5, "diameter_text": "6\"", "length_text": "17-1/2\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2\" SAE thread", "square_feet": 60 }, "status": "verified", "not_in_sources": "no Pleatco equivalent in Pleatco 2023 cross reference", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/jacuzzi/6ch-959/", "fitment": [ { "model": "J400 Series", "years": null, "note": null, "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Jacuzzi section), PDF p.42 (printed p.38); spec table PDF p.13 (printed p.9)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Jacuzzi Premium Spas, printed p.40 (PDF p.21)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Jacuzzi", "model": "6CH-960 cartridge (OEM 6540-164)", "series": "Jacuzzi Premium J400/J300 Series", "oem_part_numbers": "6540-164; 6540-476; 6541-383", "oem": "6540-164", "equivalents": { "unicel": "6CH-960", "pleatco": "PJW60TL-F2S", "filbur": "FC-2800" }, "dimensions": { "diameter_in": 6.75, "length_in": 15.5, "diameter_text": "6-3/4\"", "length_text": "15-1/2\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2\" SAE thread", "square_feet": 75 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "sq ft 75/60 by OEM P/N", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/jacuzzi/6ch-960/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Jacuzzi section), PDF p.42 (printed p.38); spec table PDF p.13 (printed p.9)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Jacuzzi Premium Spas, printed p.40 (PDF p.21)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Jacuzzi", "model": "6CH-961 cartridge (OEM 6540-164)", "series": "Jacuzzi Premium J400/J300 Series (open top)", "oem_part_numbers": "6540-164; 6540-476; 6541-383", "oem": "6540-164", "equivalents": { "unicel": "6CH-961", "pleatco": "PJW60TL-OT-F2S", "filbur": "FC-2715" }, "dimensions": { "diameter_in": 6.75, "length_in": 15.5, "diameter_text": "6-3/4\"", "length_text": "15-1/2\"", "top_fitting": "open w/ slots", "bottom_fitting": "2\" SAE thread", "square_feet": 75 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "Requires injection molded semi-circular handle (not furnished)", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/jacuzzi/6ch-961/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Jacuzzi section), PDF p.42 (printed p.38); spec table PDF p.13 (printed p.9)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Jacuzzi Premium Spas, printed p.40 (PDF p.21)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Jacuzzi", "model": "C-4326 cartridge (OEM 373045)", "series": "Jacuzzi Premium J200 Series", "oem_part_numbers": "373045", "oem": "373045", "equivalents": { "unicel": "C-4326", "pleatco": "PRB25-IN", "filbur": "FC-2375" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 25 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/jacuzzi/c-4326/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Jacuzzi section), PDF p.42 (printed p.38); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.64 (PDF p.33)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Jacuzzi", "model": "C-4950 cartridge (OEM 373045)", "series": "Jacuzzi Premium J200 Series", "oem_part_numbers": "373045", "oem": "373045", "equivalents": { "unicel": "C-4950", "pleatco": "PRB50-IN", "filbur": "FC-2390" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "Same OEM P/N listed for 25 and 50 sq ft", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/jacuzzi/c-4950/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Jacuzzi section), PDF p.42 (printed p.38); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Jacuzzi Premium Spas, printed p.40 (PDF p.21)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "4CH-30 cartridge (OEM 6540-484)", "series": "Sundance", "oem_part_numbers": "6540-484", "oem": "6540-484", "equivalents": { "unicel": "4CH-30", "pleatco": "PTL25P-4", "filbur": "FC-0141" }, "dimensions": { "diameter_in": 4.625, "length_in": 11.875, "diameter_text": "4-5/8\"", "length_text": "11-7/8\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 25 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources. Checked 2026-11-06: Unicel's spec table and its Freedom Spas line both rate this 4CH-30 at 30 sq ft (158 pleats, 4 oz). This Sundance OEM line (6540-484) and Filbur's Sundance line print 25 sq ft. The 25 sq ft figure stays on this row because it is the Sundance line.", "notes": null, "row_last_changed": "2026-11-07", "model_page_url": "https://myspafilter.com/sundance/4ch-30/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Sundance, printed p.51 (PDF p.26)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "4CH-35 cartridge (OEM 6540-486)", "series": "Sundance", "oem_part_numbers": "6540-486", "oem": "6540-486", "equivalents": { "unicel": "4CH-35", "pleatco": "PTL35-4", "filbur": "FC-0161" }, "dimensions": { "diameter_in": 4.625, "length_in": 16, "diameter_text": "4-5/8\"", "length_text": "16\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 40 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/4ch-35/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Sundance, printed p.51 (PDF p.26)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "5CH-402 cartridge (OEM 6540-723)", "series": "Sundance / Del Sol Redondo, Hermosa", "oem_part_numbers": "6540-723", "oem": "6540-723", "equivalents": { "unicel": "5CH-402", "pleatco": "PJW40SC-F2M", "filbur": "FC-2811" }, "dimensions": { "diameter_in": 5.1875, "length_in": 10.75, "diameter_text": "5-3/16\"", "length_text": "10-3/4\"", "top_fitting": "bar handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 50 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/5ch-402/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.66 (PDF p.34)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "6CH-47 cartridge (OEM 373043)", "series": "Sundance", "oem_part_numbers": "373043", "oem": "373043", "equivalents": { "unicel": "6CH-47", "pleatco": "PTL47W-P4", "filbur": "FC-0315" }, "dimensions": { "diameter_in": 6, "length_in": 9.125, "diameter_text": "6\"", "length_text": "9-1/8\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 45 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/6ch-47/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.66 (PDF p.34)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "7CH-90 cartridge (OEM 6540-487)", "series": "Sundance", "oem_part_numbers": "6540-487", "oem": "6540-487", "equivalents": { "unicel": "7CH-90", "pleatco": "PSD90P", "filbur": "FC-2770" }, "dimensions": { "diameter_in": 7, "length_in": 19, "diameter_text": "7\"", "length_text": "19\"", "top_fitting": "2-1/2\" / open w/ beveled edge", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 90 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/7ch-90/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.16 (printed p.12)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Sundance, printed p.52 (PDF p.27)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "8CH-102 cartridge (OEM 2540-381)", "series": "Sundance", "oem_part_numbers": "2540-381", "oem": "2540-381", "equivalents": { "unicel": "8CH-102", "pleatco": "PSD95-F2L", "filbur": "FC-2781" }, "dimensions": { "diameter_in": 8, "length_in": 15.5, "diameter_text": "8\"", "length_text": "15-1/2\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 95 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/8ch-102/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.20 (printed p.16)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.66 (PDF p.34)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "C-4305 cartridge (OEM 6540-497)", "series": "Sundance", "oem_part_numbers": "6540-497", "oem": "6540-497", "equivalents": { "unicel": "C-4305", "pleatco": "PMT50", "filbur": "FC-1630" }, "dimensions": { "diameter_in": 4.9375, "length_in": 14.875, "diameter_text": "4-15/16\"", "length_text": "14-7/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/c-4305/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Sundance, printed p.52 (PDF p.27)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "C-4335 cartridge (OEM 6000-136)", "series": "Sundance Tacoma 680", "oem_part_numbers": "6000-136", "oem": "6000-136", "equivalents": { "unicel": "C-4335", "pleatco": "PRB35-IN", "filbur": "FC-2385" }, "dimensions": { "diameter_in": 4.9375, "length_in": 9.25, "diameter_text": "4-15/16\"", "length_text": "9-1/4\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 35 }, "status": "verified", "not_in_sources": null, "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/c-4335/", "fitment": [ { "model": "Tacoma 680", "years": null, "note": null, "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.8 (printed p.4)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.64 (PDF p.33)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "C-4440 cartridge (OEM 6540-495)", "series": "Sundance", "oem_part_numbers": "6540-495", "oem": "6540-495", "equivalents": { "unicel": "C-4440", "pleatco": "PSD40-4", "filbur": "FC-2710" }, "dimensions": { "diameter_in": 4.625, "length_in": 16.75, "diameter_text": "4-5/8\"", "length_text": "16-3/4\"", "top_fitting": "castle", "bottom_fitting": "2-1/16\" / open", "square_feet": 40 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/c-4440/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Sundance, printed p.51 (PDF p.26)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "C-4950 cartridge (OEM 6540-471)", "series": "Sundance", "oem_part_numbers": "6540-471", "oem": "6540-471", "equivalents": { "unicel": "C-4950", "pleatco": "PRB50-IN", "filbur": "FC-2390" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/c-4950/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Sundance, printed p.52 (PDF p.27)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "C-7370 cartridge (OEM 6540-483)", "series": "Sundance", "oem_part_numbers": "6540-483", "oem": "6540-483", "equivalents": { "unicel": "C-7370", "pleatco": "PSD75", "filbur": "FC-2760" }, "dimensions": { "diameter_in": 7.5, "length_in": 17.75, "diameter_text": "7-1/2\"", "length_text": "17-3/4\"", "top_fitting": "castle", "bottom_fitting": "2-1/2\" / open w/ beveled edge", "square_feet": 75 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/c-7370/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.19 (printed p.15)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.64 (PDF p.33)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "C-7465 cartridge (OEM 6540-480)", "series": "Sundance (1-1/2\" system)", "oem_part_numbers": "6540-480", "oem": "6540-480", "equivalents": { "unicel": "C-7465", "pleatco": "PSD65", "filbur": "FC-2730" }, "dimensions": { "diameter_in": 7.5, "length_in": 14.75, "diameter_text": "7-1/2\"", "length_text": "14-3/4\"", "top_fitting": "castle", "bottom_fitting": "2-1/16\" / open", "square_feet": 65 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "2-1/16\" bottom ID", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/c-7465/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.19 (printed p.15)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Sundance, printed p.52 (PDF p.27)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "C-7466 cartridge (OEM 6540-481)", "series": "Sundance (2\" system)", "oem_part_numbers": "6540-481", "oem": "6540-481", "equivalents": { "unicel": "C-7466", "pleatco": "PSD65-2", "filbur": "FC-2740" }, "dimensions": { "diameter_in": 7.5, "length_in": 14.75, "diameter_text": "7-1/2\"", "length_text": "14-3/4\"", "top_fitting": "castle", "bottom_fitting": "2-5/8\" / open", "square_feet": 65 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "2-5/8\" bottom ID", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/c-7466/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.19 (printed p.15)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.65 (PDF p.33)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "C-8325 cartridge (OEM 6540-490)", "series": "Sundance Universal Length", "oem_part_numbers": "6540-490", "oem": "6540-490", "equivalents": { "unicel": "C-8325", "pleatco": "PSD125U", "filbur": "FC-2790" }, "dimensions": { "diameter_in": 8.4375, "length_in": 18, "diameter_text": "8-7/16\"", "length_text": "18\"", "top_fitting": "closed w/ 3-step edge", "bottom_fitting": "2-1/2\" / open w/ beveled edge", "square_feet": 125 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "Replaces 18\"-18-1/2\" OAL; also replaces discontinued C-8320 (OEM 6540-482)", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/c-8325/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.20 (printed p.16)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.65 (PDF p.33)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "C-8326 cartridge (OEM 6540-488)", "series": "Sundance (before 2006)", "oem_part_numbers": "6540-488", "oem": "6540-488", "equivalents": { "unicel": "C-8326", "pleatco": "PSD125-2000", "filbur": "FC-2780" }, "dimensions": { "diameter_in": 8.4375, "length_in": 19, "diameter_text": "8-7/16\"", "length_text": "19\"", "top_fitting": "1-1/2\" male slip fitting", "bottom_fitting": "2-1/2\" / open w/ beveled edge", "square_feet": 125 }, "status": "verified", "not_in_sources": null, "notes": "Contains core block/plug", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/c-8326/", "fitment": [ { "model": "Sundance spas", "years": "before 2006", "note": null, "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.20 (printed p.16)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.65 (PDF p.33)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Sundance", "model": "C-8327 cartridge (OEM 6540-488)", "series": "Sundance (after 2005)", "oem_part_numbers": "6540-488; 6540-507", "oem": "6540-488", "equivalents": { "unicel": "C-8327", "pleatco": "PSD125-2000", "filbur": "FC-2780" }, "dimensions": { "diameter_in": 8.4375, "length_in": 19, "diameter_text": "8-7/16\"", "length_text": "19\"", "top_fitting": "1-1/2\" male slip fitting", "bottom_fitting": "2-1/2\" / open w/ beveled edge", "square_feet": 125 }, "status": "verified", "not_in_sources": null, "notes": "Unicel: no core block/plug. Leisure Time Inc. describes C-8326 and C-8327 as the same cartridge; Unicel distinguishes them by the core plug", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/c-8327/", "fitment": [ { "model": "Sundance spas", "years": "after 2005", "note": null, "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.20 (printed p.16)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Leisure Time Inc.", "where": "Unicel C-8327 product page: replaces 6540-488; Pleatco PSD125-2000; Filbur FC-2780", "url": "https://leisuretimeinc.com/products/unicel-c-8327-filter-cartridge" }, { "source": "Filbur Catalog & Reference Guide", "where": "Sundance section, printed p.52 (PDF p.27), lists FC-2780 for OEM 6540-488", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "spec table, PDF p.35 (PSD125-2000, OEM 6540-488)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Sundance", "model": "C-8380 cartridge (OEM 6540-501)", "series": "Sundance MicroClean", "oem_part_numbers": "6540-501", "oem": "6540-501", "equivalents": { "unicel": "C-8380", "pleatco": "PSD85-2002", "filbur": "FC-2810" }, "dimensions": { "diameter_in": 8.4375, "length_in": 14, "diameter_text": "8-7/16\"", "length_text": "14\"", "top_fitting": "closed w/ 2\" SAE thread", "bottom_fitting": "2-1/2\" / open w/ beveled edge", "square_feet": 80 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/sundance/c-8380/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.20 (printed p.16)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.65 (PDF p.33)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Bullfrog", "model": "6CH-940 cartridge", "series": "Bullfrog Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "6CH-940", "pleatco": "PWW50P3", "filbur": "FC-0359" }, "dimensions": { "diameter_in": 6, "length_in": 8.25, "diameter_text": "6\"", "length_text": "8-1/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "injection molded 1-1/2\" SAE thread", "square_feet": 50 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/bullfrog/6ch-940/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Bullfrog section), PDF p.30 (printed p.26); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Bullfrog, printed p.29 (PDF p.15)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Bullfrog", "model": "8CH-950 cartridge (OEM 10-1035)", "series": "Bullfrog Spas", "oem_part_numbers": "10-1035", "oem": "10-1035", "equivalents": { "unicel": "8CH-950", "pleatco": "PBF35", "filbur": "FC-0536" }, "dimensions": { "diameter_in": 8, "length_in": 6, "diameter_text": "8\"", "length_text": "6\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2\" SAE thread", "square_feet": 50 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "Unicel: 8CH-950 discontinued, use 8CH-951. Pleatco 2023 cross-references 8CH-950 to PBF35, whose spec row lists OEM 10-2785 (Bullfrog 35, 2003-2012, short thread) rather than 10-1035", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/bullfrog/8ch-950/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Bullfrog section), PDF p.30 (printed p.26); spec table PDF p.20 (printed p.16)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Bullfrog, printed p.29 (PDF p.15)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Bullfrog", "model": "8CH-951 cartridge (OEM 10-2870)", "series": "Bullfrog Spas", "oem_part_numbers": "10-2870", "oem": "10-2870", "equivalents": { "unicel": "8CH-951", "pleatco": "PBF36", "filbur": null }, "dimensions": { "diameter_in": 8, "length_in": 5.75, "diameter_text": "8\"", "length_text": "5-3/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2\" SAE thread", "square_feet": 50 }, "status": "verified", "not_in_sources": "no Filbur equivalent found in Filbur catalog", "notes": "Unicel: filtration area of the original cartridge is 35 sq ft; also replaces the Bullfrog 6\" OAL element with shorter threaded end. Unicel's spec table rates 8CH-951 at 40 sq ft", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/bullfrog/8ch-951/", "fitment": [ { "model": "Bullfrog 35 filter (long thread)", "years": "2013–2017", "note": null, "source_key": "pleatco" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Bullfrog section), PDF p.30 (printed p.26); spec table PDF p.20 (printed p.16)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "spec table, PDF p.35 (PBF36: OEM 10-2870, Bullfrog 35, 2013-2017, long thread)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Bullfrog", "model": "C-4335 cartridge", "series": "Bullfrog Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-4335", "pleatco": "PRB35-IN", "filbur": "FC-2385" }, "dimensions": { "diameter_in": 4.9375, "length_in": 9.25, "diameter_text": "4-15/16\"", "length_text": "9-1/4\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 35 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/bullfrog/c-4335/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Bullfrog section), PDF p.30 (printed p.26); spec table PDF p.8 (printed p.4)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Bullfrog, printed p.29 (PDF p.15)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Bullfrog", "model": "C-4950 cartridge", "series": "Bullfrog Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-4950", "pleatco": "PRB50-IN", "filbur": "FC-2390" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/bullfrog/c-4950/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Bullfrog section), PDF p.30 (printed p.26); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Bullfrog, printed p.29 (PDF p.15)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Cal Spas", "model": "4CH-19 cartridge (OEM FIL11100305)", "series": "Cal Spas", "oem_part_numbers": "FIL11100305", "oem": "FIL11100305", "equivalents": { "unicel": "4CH-19", "pleatco": "PSG13.5P4", "filbur": "FC-0122" }, "dimensions": { "diameter_in": 4.625, "length_in": 4.625, "diameter_text": "4-5/8\"", "length_text": "4-5/8\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 13 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "Unicel: verify thread diameter", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/cal-spas/4ch-19/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Cal Spas section), PDF p.30 (printed p.26); spec table PDF p.6 (printed p.2)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.65 (PDF p.33)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Cal Spas", "model": "4CH-252 cartridge (OEM FIL11100303)", "series": "Cal Spas", "oem_part_numbers": "FIL11100303", "oem": "FIL11100303", "equivalents": { "unicel": "4CH-252", "pleatco": "PMA20-F2M", "filbur": null }, "dimensions": { "diameter_in": 4.625, "length_in": 8, "diameter_text": "4-5/8\"", "length_text": "8\"", "top_fitting": "molded cone handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 25 }, "status": "verified", "not_in_sources": "no Filbur equivalent found in Filbur catalog; no model/model-year fitment in sources", "notes": "Unicel: Cal Spa original has 4-3/4\" OD", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/cal-spas/4ch-252/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Cal Spas section), PDF p.30 (printed p.26); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Cal Spas", "model": "5CH-502 cartridge (OEM FIL11100202)", "series": "Cal Spas", "oem_part_numbers": "FIL11100202; FIL11100200; FIL11100201", "oem": "FIL11100202", "equivalents": { "unicel": "5CH-502", "pleatco": "PPM50SC-F2M", "filbur": "FC-0195" }, "dimensions": { "diameter_in": 5.1875, "length_in": 12.5, "diameter_text": "5-3/16\"", "length_text": "12-1/2\"", "top_fitting": "bar handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 50 }, "status": "verified", "not_in_sources": "FIL11100202 is tied to 5CH-502 by retailer listings, not by a manufacturer page; no model/model-year fitment in sources", "notes": "Unicel prints OEM FIL11100202 on its own line between 5CH-502 and 5CH-752. Two Cal Spas parts retailers resolve it: Hot Tub Outpost lists Cal Spas FIL11100202 as a 50 sq ft cartridge, 12-1/2\" long with a handle top and 2\" MPT bottom, that replaces FIL11100200 and FIL11100201 and crosses to Unicel 5CH-502 and Pleatco PPM50SC-F2M; Wizard of Spas lists FIL11100202 (and FIL11100201) as the Cal Spas 50 sq ft cartridge with Filbur FC-0195M. Hot Tub Outpost prints the diameter as 5-1/8\" (Unicel and Filbur: 5-3/16\") and gives the Filbur number as FC-0196, which the Filbur catalog assigns to the 35 sq ft 5CH-352; the Filbur match shown here is the catalog's own FC-0195.", "row_last_changed": "2026-10-25", "model_page_url": "https://myspafilter.com/cal-spas/5ch-502/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Cal Spas section), PDF p.30 (printed p.26); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Cal Spas, printed p.29 (PDF p.15)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Hot Tub Outpost (Cal Spas parts retailer)", "where": "Cal Spa 50 Square Foot Filter, MPN FIL11100202: 5-1/8\" OD, 12-1/2\" long, handle top, 2\" MPT bottom; replaces FIL11100200 and FIL11100201; Unicel 5CH-502, Pleatco PPM50SC-F2M", "url": "https://www.hottuboutpost.com/cal-spa-50-square-foot-filter-calfil11100202/" }, { "source": "Wizard of Spas (Cal Spas parts retailer)", "where": "FIL11100202 Cal Spas 50 sq ft cartridge; lists FC-0195M, FIL11100201, FIL11100202", "url": "https://wizardofspas.com/products/fil11100201" } ] }, { "brand": "Cal Spas", "model": "5CH-752 cartridge", "series": "Cal Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "5CH-752", "pleatco": "PCAL60-F2M", "filbur": "FC-0202" }, "dimensions": { "diameter_in": 5.1875, "length_in": 16.125, "diameter_text": "5-3/16\"", "length_text": "16-1/8\"", "top_fitting": "bar handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 75 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": "Leisure Time Inc. lists Cal Spas OEM 50753 for 5CH-752 (single retailer source, not shown as OEM). Filbur's catalog prints the Unicel number beside FC-0202 as \"5CH-702\"", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/cal-spas/5ch-752/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Cal Spas section), PDF p.30 (printed p.26); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Leisure Time Inc.", "where": "Unicel 5CH-752 product page: Filbur FC-0202; Pleatco PCAL60-F2M", "url": "https://leisuretimeinc.com/products/unicel-5ch-752-filter-cartridge" }, { "source": "Pleatco 2023 Catalog", "where": "Filbur-to-Pleatco cross reference, PDF p.48", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Cal Spas", "model": "6CH-975 cartridge (OEM FIL11700016)", "series": "Cal Spas", "oem_part_numbers": "FIL11700016", "oem": "FIL11700016", "equivalents": { "unicel": "6CH-975", "pleatco": null, "filbur": null }, "dimensions": { "diameter_in": 6.75, "length_in": 15.5, "diameter_text": "6-3/4\"", "length_text": "15-1/2\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2\" SAE thread", "square_feet": 75 }, "status": "unverified", "not_in_sources": "no Pleatco equivalent in Pleatco 2023 cross reference; no Filbur equivalent found in Filbur catalog; no model/model-year fitment in sources Checked 2026-11-03: ezhottubparts still crosses FIL11700016 to Unicel 6CH-960 (52 sq ft); a Spa Parts Warehouse listing for FIL75-7D155H2MCT-3 / FIL11700016 gives 75 sq ft, 7\" x 15\", 2\" MPT, which matches 6CH-975's area but neither catalog's thread wording. Checked 2026-11-04: Unicel's Cal Spas section still prints FIL11700016 as 6CH-975 (6-3/4\" x 15-1/2\", 2\" SAE, 75 sq ft). A search of the Filbur catalog the same day found no FIL11700016. Unresolved. Checked 2026-11-06: Unicel PDF p.30 (printed p.26) still prints FIL11700016 as 6CH-975, 6-3/4\" x 15-1/2\", 2\" SAE, 75 sq ft. No new manufacturer model chart and no Filbur row for FIL11700016. Checked 2026-11-07: Unicel’s Cal Spas line still prints FIL11700016 as 6CH-975, 6-3/4\" × 15-1/2\", 2\" SAE, 75 sq ft. No model-to-cartridge chart was found. Still unresolved. Checked 2026-11-08: Unicel PDF p.30 still prints FIL11700016 as 6CH-975, 6-3/4\" x 15-1/2\", 2\" SAE, 75 sq ft. A text search of the Pleatco 2023 PDF and the Filbur PDF found no 6CH-975 and no FIL11700016. Still unresolved.", "notes": null, "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/cal-spas/6ch-975/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Cal Spas section), PDF p.30 (printed p.26); spec table PDF p.13 (printed p.9)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Spa Parts Warehouse (retailer listing)", "where": "Replacement for FIL75-7D155H2MCT-3 / FIL11700016 (fetched via search 2026-11-03): 7\" diameter, 15\" length, 2\" MPT, 75 sq ft", "url": "https://shop.spapartswarehouse.com/products/filter-cartridge-75-sq-ft-7-odx-15-5-h-x-2-idx-coarse-thread-male" } ] }, { "brand": "Cal Spas", "model": "C-4305 cartridge", "series": "Cal Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-4305", "pleatco": "PMT50", "filbur": "FC-1630" }, "dimensions": { "diameter_in": 4.9375, "length_in": 14.875, "diameter_text": "4-15/16\"", "length_text": "14-7/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/cal-spas/c-4305/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Cal Spas section), PDF p.30 (printed p.26); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Cal Spas, printed p.29 (PDF p.15)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Cal Spas", "model": "C-4950 cartridge", "series": "Cal Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-4950", "pleatco": "PRB50-IN", "filbur": "FC-2390" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/cal-spas/c-4950/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Cal Spas section), PDF p.30 (printed p.26); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Cal Spas, printed p.29 (PDF p.15)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Cal Spas", "model": "C-4995 cartridge", "series": "Cal Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-4995", "pleatco": "PCAL100", "filbur": "FC-2940" }, "dimensions": { "diameter_in": 4.9375, "length_in": 23.625, "diameter_text": "4-15/16\"", "length_text": "23-5/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 100 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/cal-spas/c-4995/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Cal Spas section), PDF p.30 (printed p.26); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Cal Spas, printed p.29 (PDF p.15)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Cal Spas", "model": "C-5374 cartridge", "series": "Cal Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-5374", "pleatco": "PLBS75", "filbur": "FC-2971" }, "dimensions": { "diameter_in": 5.3125, "length_in": 14.8125, "diameter_text": "5-5/16\"", "length_text": "14-13/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 75 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": "Filbur lists its FC-2971 equivalent at 5-5/16\" x 14-11/16\", 65 sq ft", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/cal-spas/c-5374/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Cal Spas section), PDF p.30 (printed p.26); spec table PDF p.11 (printed p.7)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Cal Spas, printed p.29 (PDF p.15)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Master Spas", "model": "4CH-20 cartridge", "series": "Master Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "4CH-20", "pleatco": "PHC25", "filbur": "FC-0125" }, "dimensions": { "diameter_in": 4.625, "length_in": 6.75, "diameter_text": "4-5/8\"", "length_text": "6-3/4\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 20 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/master-spas/4ch-20/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Master Spas, printed p.43 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Master Spas", "model": "4CH-252 cartridge (OEM X268521)", "series": "Master Spas Contractor Series 415 / Clarity Spas 415", "oem_part_numbers": "X268521", "oem": "X268521", "equivalents": { "unicel": "4CH-252", "pleatco": "PMA20-F2M", "filbur": null }, "dimensions": { "diameter_in": 4.625, "length_in": 8, "diameter_text": "4-5/8\"", "length_text": "8\"", "top_fitting": "molded cone handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 25 }, "status": "verified", "not_in_sources": "no Filbur equivalent found in Filbur catalog", "notes": "Unicel: Master Spas original has 4-3/4\" OD", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/master-spas/4ch-252/", "fitment": [ { "model": "Contractor Series 415", "years": null, "note": null, "source_key": "unicel" }, { "model": "Clarity Spas 415", "years": null, "note": null, "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Master Spas", "model": "4CH-935 cartridge", "series": "Master Spas Eco-Pur (5\" OD)", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "4CH-935", "pleatco": "PWW35L", "filbur": null }, "dimensions": { "diameter_in": 4.9375, "length_in": 9.25, "diameter_text": "4-15/16\"", "length_text": "9-1/4\"", "top_fitting": "v-groove semi-circular handle", "bottom_fitting": "2\" female SAE thread", "square_feet": 35 }, "status": "verified", "not_in_sources": "no Filbur equivalent found in Filbur catalog; no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": "Unicel: replacement for 5\" OD Eco-Pur systems; must verify OAL", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/master-spas/4ch-935/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.8 (printed p.4)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Master Spas", "model": "4CH-949 cartridge", "series": "Master Spas Eco-Pur (5\" OD)", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "4CH-949", "pleatco": "PWW50L", "filbur": "FC-0172" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.5, "diameter_text": "4-15/16\"", "length_text": "13-1/2\"", "top_fitting": "v-groove semi-circular handle", "bottom_fitting": "2\" female SAE thread", "square_feet": 50 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": "Unicel: replacement for 5\" OD Eco-Pur systems; must verify OAL", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/master-spas/4ch-949/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.66 (PDF p.34)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Master Spas", "model": "6CH-352 cartridge (OEM PMA-R1)", "series": "Master Spas Eco-Pur (6\" OD)", "oem_part_numbers": "PMA-R1", "oem": "PMA-R1", "equivalents": { "unicel": "6CH-352", "pleatco": "PAS40-F2M", "filbur": "FC-0312" }, "dimensions": { "diameter_in": 6, "length_in": 8, "diameter_text": "6\"", "length_text": "8\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 35 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "Unicel: must remove black stand pipe. Filbur cross-references 6CH-352 to FC-0312 but lists FC-0312 at 6\" x 7\"", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/master-spas/6ch-352/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.66 (PDF p.34)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Master Spas", "model": "6CH-402 cartridge (OEM PMA40L-F2M)", "series": "Master Spas Twilight Series", "oem_part_numbers": "PMA40L-F2M", "oem": "PMA40L-F2M", "equivalents": { "unicel": "6CH-402", "pleatco": "PMA40L-F2M", "filbur": "FC-0317" }, "dimensions": { "diameter_in": 6, "length_in": 9.5, "diameter_text": "6\"", "length_text": "9-1/2\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 40 }, "status": "verified", "not_in_sources": null, "notes": "Unicel prints PMA40L-F2M (a Pleatco number) in its OEM column; Pleatco lists Master Spas Twilight OEM X268365 for PMA40L-F2M. Unicel: must remove black stand pipe", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/master-spas/6ch-402/", "fitment": [ { "model": "Twilight Series", "years": null, "note": null, "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Master Spas (Twilight), printed p.43 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Master Spas", "model": "6CH-45 cartridge", "series": "Master Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "6CH-45", "pleatco": "PTL45W-P-4", "filbur": "FC-0330" }, "dimensions": { "diameter_in": 6, "length_in": 12.375, "diameter_text": "6\"", "length_text": "12-3/8\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 45 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry. Checked 2026-11-06: Filbur's size table and Freedom Spas section print FC-0330 / 6CH-45 at 6 x 12-1/4 in, against Unicel's 12-3/8 in kept on this row. Freedom model names are on the Freedom Spas fitment page.", "notes": null, "row_last_changed": "2026-11-07", "model_page_url": "https://myspafilter.com/master-spas/6ch-45/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Master Spas, printed p.43 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Master Spas", "model": "6CH-940 cartridge", "series": "Master Spas swim spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "6CH-940", "pleatco": "PWW50P3", "filbur": "FC-0359" }, "dimensions": { "diameter_in": 6, "length_in": 8.25, "diameter_text": "6\"", "length_text": "8-1/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "injection molded 1-1/2\" SAE thread", "square_feet": 45 }, "status": "verified", "not_in_sources": "Unicel lists no OEM part number for this brand entry", "notes": "Unicel: for use in Master Spas swim spas", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/master-spas/6ch-940/", "fitment": [ { "model": "Master Spas swim spas", "years": null, "note": null, "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.66 (PDF p.34)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Master Spas", "model": "7CH-322 cartridge", "series": "Master Spas Eco-Pur (7\"/8\" OD)", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "7CH-322", "pleatco": "PAS35-F2M", "filbur": "FC-0420" }, "dimensions": { "diameter_in": 7, "length_in": 8, "diameter_text": "7\"", "length_text": "8\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 32 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": "Unicel: replacement for 7\" or 8\" OD Eco-Pur systems; remove black stand pipe for 8\" OD", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/master-spas/7ch-322/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.14 (printed p.10)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Unicel-to-Filbur reverse cross reference, printed p.66 (PDF p.34)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Master Spas", "model": "8CH-66 cartridge", "series": "Master Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "8CH-66", "pleatco": "PMA60-F2M", "filbur": "FC-0515" }, "dimensions": { "diameter_in": 8, "length_in": 9.25, "diameter_text": "8\"", "length_text": "9-1/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 60 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/master-spas/8ch-66/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.20 (printed p.16)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Master Spas, printed p.43 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Master Spas", "model": "C-3310AM cartridge", "series": "Master Spas Eco-Pur (inner)", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-3310AM", "pleatco": "PMA10", "filbur": null }, "dimensions": { "diameter_in": 3.875, "length_in": 7, "diameter_text": "3-7/8\"", "length_text": "7\"", "top_fitting": "2-3/16\" / open", "bottom_fitting": "2-3/16\" / open", "square_feet": 8 }, "status": "verified", "not_in_sources": "no Filbur equivalent found in Filbur catalog; no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry", "notes": "Unicel: antimicrobial media; used with a C-7330 or C-8341 outer cartridge in Eco-Pur systems", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/master-spas/c-3310am/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.6 (printed p.2)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Master Spas", "model": "C-7330 cartridge", "series": "Master Spas Eco-Pur Micro Filter (2002-2005)", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-7330", "pleatco": "PMA30-2002-R", "filbur": "FC-1003" }, "dimensions": { "diameter_in": 7, "length_in": 7.25, "diameter_text": "7\"", "length_text": "7-1/4\"", "top_fitting": "4-1/8\" / open", "bottom_fitting": "4-1/8\" / open", "square_feet": 30 }, "status": "verified", "not_in_sources": "Unicel lists no OEM part number for this brand entry", "notes": "Unicel: part of Eco-Pur filtration system, 2002 to 2005", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/master-spas/c-7330/", "fitment": [ { "model": "Eco-Pur filtration system", "years": "2002–2005", "note": null, "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.14 (printed p.10)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Master Spas, printed p.43 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Master Spas", "model": "C-8341 cartridge", "series": "Master Spas Eco-Pur Micro Filter (2006-present)", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-8341", "pleatco": "PMA45-2004-R", "filbur": "FC-1007" }, "dimensions": { "diameter_in": 8, "length_in": 6.75, "diameter_text": "8\"", "length_text": "6-3/4\"", "top_fitting": "4\" / open w/ raised ring", "bottom_fitting": "4\" / open w/ raised ring", "square_feet": 40 }, "status": "verified", "not_in_sources": "Unicel lists no OEM part number for this brand entry", "notes": "Unicel: part of Eco-Pur filtration system, 2006 to present; two 40 sq ft cartridges required", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/master-spas/c-8341/", "fitment": [ { "model": "Eco-Pur filtration system", "years": "2006–present", "note": "two cartridges required", "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Master Spas section), PDF p.45 (printed p.41); spec table PDF p.20 (printed p.16)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Master Spas, printed p.43 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Bullfrog", "model": "PBF17 cartridge (OEM 10-00281)", "series": "Bullfrog STIL Series (coreless)", "oem_part_numbers": "10-00281", "oem": "10-00281", "equivalents": { "unicel": null, "pleatco": "PBF17", "filbur": null }, "dimensions": { "diameter_in": 6.625, "length_in": 6.25, "diameter_text": "6-5/8\"", "length_text": "6-1/4\"", "top_fitting": "3-3/8\" open (coreless)", "bottom_fitting": "4-1/2\" open (coreless)", "square_feet": 18 }, "status": "verified", "not_in_sources": "no Unicel equivalent in Unicel 2026 guide; no Filbur equivalent found; sq ft rating differs between Pleatco and Leisure Time", "notes": "Pleatco: Bullfrog 18 coreless, 2017-current. Leisure Time Inc. rates the OEM 10-00281 cartridge at approximately 27 sq ft and notes 2015-2017 STIL spas need Filter Core Cage & Cap Assembly 10-00417; Leisure Time Inc.: Coreless cartridge; the correct filter cage and cap must be installed.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/bullfrog/pbf17/", "fitment": [ { "model": "Bullfrog STIL Series", "years": "2018–2026", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Pleatco 2023 Catalog", "where": "spec table, PDF p.33 (OEM 10-00281)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Leisure Time Inc.", "where": "Product page: OEM number, model list and years", "url": "https://leisuretimeinc.com/products/bullfrog-stil-series-10-00281-filter-cartridges" } ] }, { "brand": "Bullfrog", "model": "PBF40 cartridge (OEM 10-00282)", "series": "Bullfrog A / R / X Series (coreless)", "oem_part_numbers": "10-00282", "oem": "10-00282", "equivalents": { "unicel": null, "pleatco": "PBF40", "filbur": null }, "dimensions": { "diameter_in": 8, "length_in": 6.25, "diameter_text": "8\"", "length_text": "6-1/4\"", "top_fitting": "3-3/8\" open (coreless)", "bottom_fitting": "4-1/2\" open (coreless)", "square_feet": 30 }, "status": "verified", "not_in_sources": "no Unicel equivalent in Unicel 2026 guide; no Filbur equivalent found; sq ft rating differs between Pleatco and Leisure Time", "notes": "Pleatco: Bullfrog 30 coreless, 2017-current. Leisure Time Inc. rates the OEM 10-00282 cartridge at 50 sq ft and notes 2013-2017 A/R/X spas need the Filter Core Cage & Cap Assembly; 2023-and-newer A Series use Simplicity flat filters; Leisure Time Inc.: Coreless cartridge; the correct filter cage and cap must be installed. 2023-and-newer A Series models use Simplicity flat filters.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/bullfrog/pbf40/", "fitment": [ { "model": "Bullfrog A Series", "years": "2018–2022", "note": null, "source_key": "lt" }, { "model": "Bullfrog R Series", "years": "2018–2022", "note": null, "source_key": "lt" }, { "model": "Bullfrog X Series", "years": "2018–2026", "note": null, "source_key": "lt" } ], "sources": [ { "source": "Pleatco 2023 Catalog", "where": "spec table, PDF p.35 (OEM 10-00282)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Leisure Time Inc.", "where": "Product page: OEM number, model list and years", "url": "https://leisuretimeinc.com/products/bullfrog-a-r-x-series-10-00282-filter-cartridges" } ] }, { "brand": "Marquis Spas", "model": "5CH-352 cartridge (OEM 20042)", "series": "Marquis Spas (listed as Pacific Marquis in the Filbur catalog)", "oem_part_numbers": "20042; 20092; 370-0240; 370-0242; 370-0243; 370-0683; 370-0698", "oem": "20042", "equivalents": { "unicel": "5CH-352", "pleatco": "PPM35SC-F2M", "filbur": "FC-0196" }, "dimensions": { "diameter_in": 5.1875, "length_in": 12.5, "diameter_text": "5-3/16\"", "length_text": "12-1/2\"", "top_fitting": "bar handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 35 }, "status": "verified", "not_in_sources": "Marquis's 2001 and 2002 owner's manuals name a single #5040 50 sq ft cartridge for all 2000-and-later spas, which does not match the finder's 35/50 split", "notes": "Pleatco 2023 lists OEM 20042, 370-0242 and 370-0243 for PPM35SC-F2M; Filbur lists OEM 370-0242 for FC-0196 and prints N/A in its Pleatco column.", "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/marquis-spas/5ch-352/", "fitment": [ { "model": "Pacific Marquis Spas", "years": null, "note": "Pleatco spec table, OEM 20042 / 370-0242 / 370-0243", "source_key": "pleatco" }, { "model": "Cal Spas Low Flow Recirc 36SF", "years": null, "note": "same Pleatco row", "source_key": "pleatco" }, { "model": "Marquis Signature Series", "years": "2000–2021", "note": "threaded 35 sq ft, part 20092", "source_key": "marquis" }, { "model": "Marquis Vector21", "years": "2016 and newer", "note": "threaded 35 sq ft, part 20092", "source_key": "marquis" }, { "model": "Marquis Elite: Nashville Elite", "years": "2020 and newer", "note": "threaded 35 sq ft, part 20042", "source_key": "marquis" }, { "model": "Marquis Celebrity Series: Nashville Elite", "years": "2018–2019", "note": "threaded 35 sq ft, part 20042", "source_key": "marquis" }, { "model": "Marquis Celebrity hot tubs", "years": "2019 and newer", "note": "threaded 35 sq ft, part 20042", "source_key": "marquis" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Marquis Spas section), PDF p.44 (printed p.40); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47 (5CH-352 = PPM35SC-F2M); spec table PDF p.32 (OEM 20042, 370-0242, 370-0243)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Marquis Spas, printed p.42 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Marquis Spas (manufacturer filter finder)", "where": "Filter Finder (series, model years, slip-on/threaded, sq ft, part number): 20092 threaded 35 for Signature 2000–2021 and Vector21 2016 and newer; 20042 threaded 35 for Nashville Elite (2018 on) and Celebrity 2019 and newer", "url": "https://www.marquisspas.com/options-and-accessories/hot-tub-filters" } ] }, { "brand": "Marquis Spas", "model": "5CH-502 cartridge (OEM 20041)", "series": "Marquis Spas (listed as Pacific Marquis in the Filbur catalog)", "oem_part_numbers": "20041; 20091; 370-0237", "oem": "20041", "equivalents": { "unicel": "5CH-502", "pleatco": "PPM50SC-F2M", "filbur": "FC-0195" }, "dimensions": { "diameter_in": 5.1875, "length_in": 12.5, "diameter_text": "5-3/16\"", "length_text": "12-1/2\"", "top_fitting": "bar handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 50 }, "status": "verified", "not_in_sources": "Marquis's 2001 and 2002 owner's manuals name a single #5040 50 sq ft cartridge for all 2000-and-later spas", "notes": "Unicel notes this part number was formerly C-5303, and also lists the cartridge under Cal Spas. Filbur prints the Pleatco number as PPM350SC-F2M; Pleatco's own catalog and its Filbur-to-Pleatco table give PPM50SC-F2M, which is what is shown here.", "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/marquis-spas/5ch-502/", "fitment": [ { "model": "Pacific Marquis Spas", "years": null, "note": "Pleatco spec table, OEM 20041 / 370-0237", "source_key": "pleatco" }, { "model": "Cal Spas Low Flow Recirc 48SF", "years": null, "note": "same Pleatco row", "source_key": "pleatco" }, { "model": "Marquis Signature Series", "years": "2000–2021", "note": "threaded 50 sq ft, part 20091", "source_key": "marquis" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Marquis Spas section), PDF p.44 (printed p.40); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47 (5CH-502 = PPM50SC-F2M); Filbur-to-Pleatco PDF p.48 (FC-0195 = PPM50SC-F2M); spec table PDF p.32 (OEM 20041, 370-0237)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Marquis Spas, printed p.42 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Marquis Spas (manufacturer filter finder)", "where": "Filter Finder (series, model years, slip-on/threaded, sq ft, part number): 20091 threaded 50 for Signature Series 2000–2021", "url": "https://www.marquisspas.com/options-and-accessories/hot-tub-filters" } ] }, { "brand": "Marquis Spas", "model": "C-5423 cartridge (OEM 20045)", "series": "Marquis Spas (listed as Pacific Marquis in the Filbur catalog)", "oem_part_numbers": "20045; 370-0215", "oem": "20045", "equivalents": { "unicel": "C-5423", "pleatco": "PPM35TC", "filbur": "FC-3623" }, "dimensions": { "diameter_in": 5.1875, "length_in": 11.9375, "diameter_text": "5-3/16\"", "length_text": "11-15/16\"", "top_fitting": "closed", "bottom_fitting": "1-5/8\" / open", "square_feet": 35 }, "status": "verified", "not_in_sources": "Unicel notes the original 20045 was a 25 sq ft cartridge, while Marquis's finder calls it 35 sq ft", "notes": "Closed-top cartridge. Unicel's spec table rates it 34 sq ft and notes the original was 25 sq ft (115 pleats), upgraded to 35 sq ft in the replacement. Unicel lists OEM 370-0215; Filbur prints 370-215.", "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/marquis-spas/c-5423/", "fitment": [ { "model": "Marquis Signature Series", "years": "Pre-1997", "note": "slip-on 35 sq ft, part 20045", "source_key": "marquis" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Marquis Spas section), PDF p.44 (printed p.40); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Marquis Spas, printed p.42 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Marquis Spas (manufacturer filter finder)", "where": "Filter Finder (series, model years, slip-on/threaded, sq ft, part number): Signature Series pre-1997, slip-on 35, 20045", "url": "https://www.marquisspas.com/options-and-accessories/hot-tub-filters" } ] }, { "brand": "Marquis Spas", "model": "C-5434 cartridge (OEM 20043)", "series": "Marquis Spas (listed as Pacific Marquis in the Filbur catalog)", "oem_part_numbers": "20043; 370-0216", "oem": "20043", "equivalents": { "unicel": "C-5434", "pleatco": "PPM60TC", "filbur": "FC-3634" }, "dimensions": { "diameter_in": 5.1875, "length_in": 19.625, "diameter_text": "5-3/16\"", "length_text": "19-5/8\"", "top_fitting": "closed", "bottom_fitting": "1-5/8\" / open", "square_feet": 60 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": "Closed-top cartridge, listed by Unicel as Pacific Marquis (new). Unicel's spec table rates it 58 sq ft and notes the original was 40 sq ft (109 pleats), upgraded to 60 sq ft in the replacement. Unicel lists OEM 370-0216; Filbur prints 370-216.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/marquis-spas/c-5434/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Marquis Spas section), PDF p.44 (printed p.40); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Marquis Spas, printed p.43 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Marquis Spas", "model": "C-5346 cartridge (OEM 20044)", "series": "Marquis Spas (listed as Pacific Marquis in the Filbur catalog)", "oem_part_numbers": "20044; 370-0236", "oem": "20044", "equivalents": { "unicel": "C-5346", "pleatco": "PPM50TC", "filbur": "FC-3638" }, "dimensions": { "diameter_in": 5.1875, "length_in": 14.125, "diameter_text": "5-3/16\"", "length_text": "14-1/8\"", "top_fitting": "closed", "bottom_fitting": "1-5/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "alternate OEM number differs between Unicel (370-0236) and Filbur (370-217); Marquis's finder gives 20044 only and no dimensions", "notes": "Closed-top slip-on cartridge, old style. Marquis's own filter finder lists 20044 as the slip-on 50 sq ft filter for 1997–1999 Signature Series spas, which matches Unicel's C-5346 (5-3/16\" x 14-1/8\", closed top, 1-5/8\" open bottom, 50 sq ft) and Filbur's FC-3638 of the same size. The second factory number still differs: Unicel lists 370-0236, while Filbur prints 370-217 for the same size.", "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/marquis-spas/c-5346/", "fitment": [ { "model": "Marquis Signature Series", "years": "1997–1999", "note": "slip-on 50 sq ft, part 20044", "source_key": "marquis" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Marquis Spas section), PDF p.44 (printed p.40); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Marquis Spas, printed p.43 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Marquis Spas (manufacturer filter finder)", "where": "Filter Finder (series, model years, slip-on/threaded, sq ft, part number): Signature Series 1997–1999, slip-on 50, 20044", "url": "https://www.marquisspas.com/options-and-accessories/hot-tub-filters" } ] }, { "brand": "Marquis Spas", "model": "5CH-512 cartridge (OEM 20690)", "series": "Marquis Spas (listed as Pacific Marquis in the Filbur catalog)", "oem_part_numbers": "20690; 370-0699", "oem": "20690", "equivalents": { "unicel": "5CH-512", "pleatco": null, "filbur": null }, "dimensions": { "diameter_in": 5.1875, "length_in": 16, "diameter_text": "5-3/16\"", "length_text": "16\"", "top_fitting": "bar handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 50 }, "status": "verified", "not_in_sources": "no Pleatco or Filbur equivalent found in either catalog; 2026 Crown owner's manual describes a 35 sq ft filter, not the finder's 50 sq ft 20690", "notes": "Marquis's own filter finder lists part 20690 as the threaded 50 sq ft filter for Crown Series spas from 2021, Elite models (Woodstock, Vegas, Hollywood, Broadway, Monaco Elite) from 2020, and the same Elite models in the 2018–2019 Celebrity Series. Two Marquis parts dealers describe 20690 as 5-3/16\" x 16\" with a handle top and 2\" MPT thread, 50 sq ft, which matches Unicel's 5CH-512; they describe it as used on Celebrity Elite and V150 models rather than naming Crown. Marquis's 2026 Crown owner's manual describes a single 35 sq ft cartridge, which does not match the finder's 50 sq ft 20690 for Crown; see our Marquis model-year page.", "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/marquis-spas/5ch-512/", "fitment": [ { "model": "Marquis Crown Series", "years": "2021 and newer", "note": "threaded 50 sq ft", "source_key": "marquis" }, { "model": "Marquis Elite: Woodstock, Vegas, Hollywood, Broadway, Monaco Elite", "years": "2020 and newer", "note": "threaded 50 sq ft", "source_key": "marquis" }, { "model": "Marquis Celebrity Series Elite models: Woodstock, Vegas, Hollywood, Broadway, Monaco Elite", "years": "2018–2019", "note": "threaded 50 sq ft", "source_key": "marquis" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Marquis Spas section), PDF p.44 (printed p.40); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Marquis Spas (manufacturer filter finder)", "where": "Filter Finder (series, model years, slip-on/threaded, sq ft, part number): Crown Series 2021 and newer, threaded 50, 20690; Elite 2020 and newer and Celebrity Series Elite 2018–2019, threaded 50, 20690", "url": "https://www.marquisspas.com/options-and-accessories/hot-tub-filters" }, { "source": "Canada Hot Tub Parts (Marquis parts dealer)", "where": "Marquis 20690: 5-3/16\" x 16\", handle top, 2\" threaded MPT, 50 sq ft; for Celebrity Elite and V150 Select models", "url": "https://canadahottubparts.ca/marquis-spa-filter-20690/" }, { "source": "Hot Spring Supply (retailer)", "where": "Marquis Crown Collection 2021 threaded 50 sq ft filter 20690: 5-3/16\" x 16\", handle, 2\" MPT; used on some Celebrity Elite and V150 models", "url": "https://hotspringsupply.com/products/marquis-crown-collection-2021-threaded-50-sq-ft-filter" } ] }, { "brand": "Marquis Spas", "model": "5CH-902AM cartridge (OEM 20499)", "series": "Marquis Spas (listed as Pacific Marquis in the Filbur catalog)", "oem_part_numbers": "20499; 370-0694", "oem": "20499", "equivalents": { "unicel": "5CH-902AM", "pleatco": null, "filbur": null }, "dimensions": { "diameter_in": 5.1875, "length_in": 30, "diameter_text": "5-3/16\"", "length_text": "30\"", "top_fitting": "bar handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 90 }, "status": "unverified", "not_in_sources": "no Pleatco equivalent; no Filbur equivalent; no Marquis document found. Checked 2026-11-01: two spa dealers confirm OEM 20499 as a 90 sq ft, ~30\" threaded swim-spa cartridge with a handle (one also gives 20496 as the earlier number), but give the outside diameter as about 5-1/4\" to 5-1/2\" against Unicel's 5-3/16\", and one describes a fine ~1.85\" thread rather than 2\" MPT Checked 2026-11-04: Filbur's Marquis section does not list 20499 or 5CH-902AM. OGS Pool and Spa's listing prints 5-3/16\" x 30\", handle, a 2\" bottom and 90 sq ft, matching Unicel's diameter and length, but it does not say whether that 2\" bottom is MPT or the fine thread Mastercraft describes. Checked 2026-11-06: Parts4tubs lists 5CH-902AM as a Unicel cartridge for Marquis Spas and reprints the catalog line \"Cartridge, 90sqft, Bar ht, 2\"mpt b, 5-3/16\", 30\", 4oz\" (UPC 678285250115). That matches Unicel's diameter, length and 2\" MPT wording. It is not a separate measurement of the fine thread. Checked 2026-11-07: no new measurement of the thread. A listing that reprints Unicel’s 2\" MPT line does not settle the fine-thread description from 2026-11-01. Still unresolved. Checked 2026-11-08: Unicel PDF p.10 (spec) and PDF p.44 (Marquis OEM) still print 5CH-902AM at 5-3/16\" x 30\", 2\" MPT, 90 sq ft, OEM 20499 and 370-0694. Pleatco 2023 and Filbur have no 5CH-902 and no 20499. No new measurement of the fine thread. Still unresolved.", "notes": "Made with antimicrobial filter media (Unicel spec note). Only the Unicel 2026 guide lists it among the catalogs. Two spa dealers sell OEM 20499 for Marquis ATV swim spas with matching area, length and handle, but a slightly larger diameter.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/marquis-spas/5ch-902am/", "fitment": [ { "model": "Marquis ATV 14 and ATV 17 swim spas (ATV 14 Sport, ATV 14 Slash, ATV 17 Sport, ATV 17 Kona)", "years": null, "note": "some use two filters", "source_key": "mqdealer" }, { "model": "Marquis V174S and V174K swim spas", "years": "2023 and newer (select)", "note": "two 90 sq ft filters", "source_key": "mqdealer" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Marquis Spas section), PDF p.44 (printed p.40); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Southern Leisure Spas (spa dealer listing)", "where": "replaces Marquis 20499 and 20496; ~90 sq ft, ~30\" body, closed top with handle, ~2\" male thread, OD ~5-1/4\" to 5-1/2\"; Marquis ATV 14/17 and select 2023+ V174S/V174K", "url": "https://shop.southernleisurespas.com/products/marquis-atv-swim-spa-filter-20499" }, { "source": "Mastercraft Pool and Spa (spa dealer listing)", "where": "Marquis P/N 20499, 90 sq ft, 31.5\" long, 5.5\" OD, bar handle, threaded bottom; Marquis ATV 14 and ATV 17 swim spas", "url": "https://mastercraftpool.store/products/atv-90-sf-filter-2" }, { "source": "OGS Pool and Spa (spa dealer listing)", "where": "Product description fetched 2026-11-04: Marquis ATV Models, diameter 5 3/16\", length 30\", top handle, bottom 2\", 90 sq ft, Microban. Does not say MPT or fine thread.", "url": "https://www.ogspoolandspa.ca/product/filter-20499/JY67RWNJL3XMCF3HSFGUWBGW" }, { "source": "Parts4tubs (Unicel cartridge listing)", "where": "Fetched 2026-11-06: Unicel 5CH-902AM for Marquis Spas. Catalog description repeats \"90sqft, Bar ht, 2\"mpt b, 5-3/16\", 30\", 4oz\". UPC 678285250115. Not an independent thread measurement.", "url": "https://parts4tubs.com/product/cartridge-90sqft-bar-ht-2mpt-b-5-3-16-30-4oz-5ch-902am/" } ] }, { "brand": "Marquis Spas", "model": "C-5626 cartridge", "series": "Marquis Spas (listed as Pacific Marquis in the Filbur catalog)", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-5626", "pleatco": "PPM25-4", "filbur": "FC-3626" }, "dimensions": { "diameter_in": 5.1875, "length_in": 11.875, "diameter_text": "5-3/16\"", "length_text": "11-7/8\"", "top_fitting": "1-1/16\" / open", "bottom_fitting": "1-5/8\" / open", "square_feet": 25 }, "status": "verified", "not_in_sources": "no OEM part number in sources; no model/model-year fitment in sources", "notes": "Old design (Unicel); Filbur lists it as Pacific Marquis 25. Neither source gives an OEM number.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/marquis-spas/c-5626/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Marquis Spas section), PDF p.44 (printed p.40); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Marquis Spas, printed p.43 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Marquis Spas", "model": "C-5637 cartridge", "series": "Marquis Spas (listed as Pacific Marquis in the Filbur catalog)", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-5637", "pleatco": "PPM40-4", "filbur": "FC-3637" }, "dimensions": { "diameter_in": 5.1875, "length_in": 19.625, "diameter_text": "5-3/16\"", "length_text": "19-5/8\"", "top_fitting": "1-1/16\" / open", "bottom_fitting": "1-5/8\" / open", "square_feet": 40 }, "status": "verified", "not_in_sources": "no OEM part number in sources; no model/model-year fitment in sources", "notes": "Old design (Unicel); Filbur lists it as Pacific Marquis 40. Neither source gives an OEM number.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/marquis-spas/c-5637/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Marquis Spas section), PDF p.44 (printed p.40); spec table PDF p.10 (printed p.6)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Marquis Spas, printed p.43 (PDF p.22)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Dimension One Spas", "model": "4CH-30 cartridge (OEM 1561-14)", "series": "Dimension One Spas", "oem_part_numbers": "1561-14", "oem": "1561-14", "equivalents": { "unicel": "4CH-30", "pleatco": "PTL25P-4", "filbur": "FC-0141" }, "dimensions": { "diameter_in": 4.625, "length_in": 11.875, "diameter_text": "4-5/8\"", "length_text": "11-7/8\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 25 }, "status": "verified", "not_in_sources": null, "notes": "Unicel's spec table rates 4CH-30 at 30 sq ft (4 oz media); its OEM cross reference and Filbur both give 25 sq ft for the Dimension One part, which is the figure shown.", "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/dimension-one-spas/4ch-30/", "fitment": [ { "model": "Dimension One Legend", "years": "1996", "note": null, "source_key": "hto" }, { "model": "Dimension One SRX, Impulse, Duet", "years": "1991 and 1993", "note": null, "source_key": "hto" }, { "model": "Dimension One Little Dipper", "years": "1994–1995", "note": null, "source_key": "hto" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Dimension One Spas section), PDF p.33 (printed p.29); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Dimension One Spas, printed p.33 (PDF p.17)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Hot Tub Outpost (retailer OEM listing)", "where": "01561-14: 4-3/4\" OD x 11-7/8\", handle, 1-1/2\" MPT fine thread; 1996 Legend, 1991 and 1993 SRX/Impulse/Duet, 1994–1995 Little Dipper; replaces Unicel 4CH-30, Filbur FC-0141, Pleatco PTL25P-4", "url": "https://www.hottuboutpost.com/dimension-one-30-square-foot-spa-filter-01561-14/" } ] }, { "brand": "Dimension One Spas", "model": "4CH-50 cartridge (OEM 1561-05)", "series": "Dimension One Spas", "oem_part_numbers": "1561-05", "oem": "1561-05", "equivalents": { "unicel": "4CH-50", "pleatco": "PTL50P-4", "filbur": "FC-0151" }, "dimensions": { "diameter_in": 4.625, "length_in": 14.75, "diameter_text": "4-5/8\"", "length_text": "14-3/4\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 50 }, "status": "verified", "not_in_sources": null, "notes": null, "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/dimension-one-spas/4ch-50/", "fitment": [ { "model": "Dimension One Legend, Californian, Ambassador, Chancellor", "years": "1991", "note": null, "source_key": "hto" }, { "model": "Dimension One Californian, Challenger, Legend 1500 Series", "years": "1992", "note": null, "source_key": "hto" }, { "model": "Dimension One Arena", "years": "1993", "note": null, "source_key": "hto" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Dimension One Spas section), PDF p.33 (printed p.29); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Dimension One Spas, printed p.33 (PDF p.17)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Hot Tub Outpost (retailer OEM listing)", "where": "01561-05: 4-3/4\" x 14-3/4\", handle, 1-1/2\" MPT fine thread; 1991 Legend/Californian/Ambassador/Chancellor, 1992 Californian/Challenger/Legend 1500 Series, 1993 Arena; replaces Unicel 4CH-50, Filbur FC-0151", "url": "https://www.hottuboutpost.com/dimension-one-50-square-foot-spa-filter-01561-05/" } ] }, { "brand": "Dimension One Spas", "model": "4CH-65 cartridge (OEM 1561-06)", "series": "Dimension One Spas", "oem_part_numbers": "1561-06; 1561-07", "oem": "1561-06", "equivalents": { "unicel": "4CH-65", "pleatco": null, "filbur": null }, "dimensions": { "diameter_in": 4.625, "length_in": 19.625, "diameter_text": "4-5/8\"", "length_text": "19-5/8\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 65 }, "status": "verified", "not_in_sources": "no Pleatco or Filbur equivalent in either catalog; 1561-07 (80 sq ft) maps to a 65 sq ft replacement; no model/model-year fitment in sources", "notes": "Unicel lists both 1561-06 (65 sq ft) and 1561-07 (80 sq ft) against 4CH-65 and notes the original was 23-3/4\" overall. Two retailers (SpaStore and Hot Tub Outpost) tie OEM 1561-06 and 1561-07 to Unicel 4CH-65 at 4-5/8\" x 19-5/8\" with a handle top and 1-1/2\" MPT bottom, 65 sq ft. They also name Pleatco PTL65H-P4 / PTL65 and Filbur FC-0171, but neither number appears in the Pleatco 2023 or Filbur catalogs, so they are not shown as equivalents.", "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/dimension-one-spas/4ch-65/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Dimension One Spas section), PDF p.33 (printed p.29); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "SpaStore.com (retailer)", "where": "AK-9008: OEM 1561-06, 1561-07; Unicel 4CH-65; Pleatco PTL65H-P4; Filbur FC-0171; 4-5/8\" x 19-5/8\", handle, 1-1/2\" MPT, 65 sq ft", "url": "https://www.spastore.com/spa-filter-baleen-ak-9008-oem-1561-06-1561-07-pleatco-ptl65h-p4-unicel-4ch-65-filbur-fc-0171/" }, { "source": "Hot Tub Outpost (retailer)", "where": "AK-9008 for Dimension One: lists 1561-06, 4CH-65, FC-0171, PTL65; 4-5/8\" x 19-5/8\", 1-1/2\" MPT, molded cone handle, 65 sq ft", "url": "https://www.hottuboutpost.com/ak-9008-dimension-one-spa-filter-ptl65-h-4ch-65-d1/" } ] }, { "brand": "Dimension One Spas", "model": "4CH-940 cartridge (OEM 1561-13)", "series": "Dimension One Spas (1-1/4\" SAE thread)", "oem_part_numbers": "1561-13", "oem": "1561-13", "equivalents": { "unicel": "4CH-940", "pleatco": "PDO-UF40P2", "filbur": "FC-0177" }, "dimensions": { "diameter_in": 4.625, "length_in": 15, "diameter_text": "4-5/8\"", "length_text": "15\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/4\" SAE thread", "square_feet": 40 }, "status": "verified", "not_in_sources": "no model/model-year fitment in sources", "notes": null, "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/dimension-one-spas/4ch-940/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Dimension One Spas section), PDF p.33 (printed p.29); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Dimension One Spas, printed p.33 (PDF p.17)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Dimension One Spas", "model": "4CH-950 cartridge (OEM 1561-04)", "series": "Dimension One Spas (1-1/4\" SAE thread)", "oem_part_numbers": "1561-04", "oem": "1561-04", "equivalents": { "unicel": "4CH-950", "pleatco": "PDO-UF25P2", "filbur": "FC-0173" }, "dimensions": { "diameter_in": 4.625, "length_in": 12, "diameter_text": "4-5/8\"", "length_text": "12\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/4\" SAE thread", "square_feet": 25 }, "status": "verified", "not_in_sources": null, "notes": "Unicel gives the length as 12\"; Filbur's table prints 11-7/8\" (and \"4-5/8 x 12\" in its description) for FC-0173.", "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/dimension-one-spas/4ch-950/", "fitment": [ { "model": "Dimension One Little Dipper", "years": "1996–1998", "note": null, "source_key": "hto" }, { "model": "Dimension One El Nino", "years": "1991", "note": null, "source_key": "hto" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Dimension One Spas section), PDF p.33 (printed p.29); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Dimension One Spas, printed p.33 (PDF p.17)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Hot Tub Outpost (retailer OEM listing)", "where": "01561-04: 4.62\" x 11.50\", handle, 1-1/4\" SAE coarse thread; 1996–1998 Little Dipper, 1991 El Nino, also Saratoga Spas", "url": "https://www.hottuboutpost.com/dimension-one-25-square-foot-spa-filter-01561-04/" } ] }, { "brand": "Dimension One Spas", "model": "7CH-552 cartridge (OEM 1561-10)", "series": "Dimension One Spas", "oem_part_numbers": "1561-10", "oem": "1561-10", "equivalents": { "unicel": "7CH-552", "pleatco": null, "filbur": null }, "dimensions": { "diameter_in": 7, "length_in": 10.5, "diameter_text": "7\"", "length_text": "10-1/2\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 52 }, "status": "verified", "not_in_sources": "no current Pleatco or Filbur equivalent (Pleatco PTL55XW-F2M deactivated; FC-0465 not in the Filbur catalog); 1994 Arena/Diamante also listed under 1561-03", "notes": "Unicel's Dimension One cross reference rates 1561-10 / 7CH-552 at 75 sq ft, but Unicel's own spec table rates 7CH-552 at 52 sq ft (7\" x 10-1/2\", 2\" MPT, semi-circular handle), and both retailer listings (Hot Tub Outpost and SpaStore) give 52 sq ft at 7\" x 10-1/2\" with a 2\" MPT bottom; 52 is shown. Both retailers name Pleatco PTL55XW-F2M and Filbur FC-0465 as equivalents, but the Pleatco 2023 catalog lists PTL55XW-F2M among its deactivated part numbers with no replacement (PDF p.24) and the Filbur catalog does not list FC-0465, so neither is shown as a current equivalent. Hot Tub Outpost lists the 1994 Arena and Diamante under this part, while its 01561-03 listing also names the 1994 Arena and Diamante; check the old cartridge.", "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/dimension-one-spas/7ch-552/", "fitment": [ { "model": "Dimension One Platinum Series", "years": "1995", "note": null, "source_key": "hto" }, { "model": "Dimension One Arena, Diamante", "years": "1994", "note": "listed as Diamonte", "source_key": "hto" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Dimension One Spas section), PDF p.33 (printed p.29), 75 sq ft; spec table PDF p.15 (printed p.11), 7CH-552 rated 52 sq ft", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Hot Tub Outpost (retailer OEM listing)", "where": "01561-10: 7\" x 10.5\", handle, 2\" MPT fine thread, 52 sq ft; 1995 Platinum Series, 1994 Arena and Diamonte; replaces Unicel 7CH-552, Filbur FC-0465, Pleatco PTL55XW-F2M", "url": "https://www.hottuboutpost.com/dimension-one-52-square-foot-spa-filter-01561-10/" }, { "source": "SpaStore.com (retailer)", "where": "AK-9026: OEM 1561-10, Unicel 7CH-552, Pleatco PTL55XW-F2M, Filbur FC-0465; 7\" x 10-1/2\", handle, 2\" MPT, 52 sq ft", "url": "https://www.spastore.com/spa-filter-baleen-ak-9026-oem-1561-10-pleatco-ptl55xw-f2m-unicel-7ch-552-filbur-fc-0465/" }, { "source": "Pleatco 2023 Catalog", "where": "Deactivated Pleatco part numbers, PDF p.24: PTL55XW-F2M, replacement N/A", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Dimension One Spas", "model": "7CH-752 cartridge (OEM 1561-02)", "series": "Dimension One Spas", "oem_part_numbers": "1561-02", "oem": "1561-02", "equivalents": { "unicel": "7CH-752", "pleatco": "PTL75XW-F2M", "filbur": "FC-0470" }, "dimensions": { "diameter_in": 7, "length_in": 14.75, "diameter_text": "7\"", "length_text": "14-3/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2” male thread/MPT", "square_feet": 75 }, "status": "verified", "not_in_sources": null, "notes": null, "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/dimension-one-spas/7ch-752/", "fitment": [ { "model": "Dimension One Platinum Series", "years": "1992–1994", "note": null, "source_key": "hto" }, { "model": "Dimension One Californian SL", "years": "1993–1994", "note": null, "source_key": "hto" }, { "model": "Dimension One Elite SL", "years": "1993", "note": null, "source_key": "hto" }, { "model": "Dimension One Seville SL, Ultra Series, Legend Series", "years": "1994", "note": null, "source_key": "hto" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Dimension One Spas section), PDF p.33 (printed p.29); spec table PDF p.15 (printed p.11)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Dimension One Spas, printed p.33 (PDF p.17)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Hot Tub Outpost (retailer OEM listing)", "where": "01561-02: 7\" x 14-3/4\", handle, 2\" MPT fine thread, 75 sq ft; 1992–1994 Platinum Series, 1993–1994 Californian SL, 1993 Elite SL, 1994 Seville SL, Ultra and Legend Series; replaces Unicel 7CH-752, Filbur FC-0470, Pleatco PTL75XW-F2M", "url": "https://www.hottuboutpost.com/dimension-one-75-square-foot-spa-filter-01561-02/" } ] }, { "brand": "Dimension One Spas", "model": "7CH-975 cartridge (OEM 1561-12)", "series": "Dimension One Spas (1-1/2\" SAE thread)", "oem_part_numbers": "1561-12", "oem": "1561-12", "equivalents": { "unicel": "7CH-975", "pleatco": "PDO75P3", "filbur": "FC-0475" }, "dimensions": { "diameter_in": 7, "length_in": 10.5, "diameter_text": "7\"", "length_text": "10-1/2\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/2\" SAE thread", "square_feet": 75 }, "status": "verified", "not_in_sources": null, "notes": null, "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/dimension-one-spas/7ch-975/", "fitment": [ { "model": "Dimension One Madrid, Barcelona", "years": "1996–2000", "note": null, "source_key": "hto" }, { "model": "@Home hot tubs (all)", "years": "2000", "note": null, "source_key": "hto" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Dimension One Spas section), PDF p.33 (printed p.29); spec table PDF p.15 (printed p.11)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Dimension One Spas, printed p.33 (PDF p.17)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Hot Tub Outpost (retailer OEM listing)", "where": "01561-12: 7\" x 10-5/8\", handle, 1-1/2\" SAE coarse thread, 75 sq ft; 1996–2000 Madrid and Barcelona, all 2000 model-year @Home hot tubs", "url": "https://www.hottuboutpost.com/dimension-one-75-square-foot-spa-filter-01561-12/" } ] }, { "brand": "Dimension One Spas", "model": "C-4340 cartridge (OEM 1561-03)", "series": "Dimension One Spas", "oem_part_numbers": "1561-03", "oem": "1561-03", "equivalents": { "unicel": "C-4340", "pleatco": "PMT40", "filbur": "FC-3081" }, "dimensions": { "diameter_in": 4.9375, "length_in": 11.625, "diameter_text": "4-15/16\"", "length_text": "11-5/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 40 }, "status": "verified", "not_in_sources": null, "notes": "Discontinued by Dimension One Spas (noted in both the Unicel guide and the Filbur catalog); the replacement cartridge is still made.", "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/dimension-one-spas/c-4340/", "fitment": [ { "model": "Dimension One Arena, Diamante, Quadra", "years": "1994", "note": null, "source_key": "hto" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Dimension One Spas section), PDF p.33 (printed p.29); spec table PDF p.8 (printed p.4)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Dimension One Spas, printed p.33 (PDF p.17)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Hot Tub Outpost (retailer OEM listing)", "where": "01561-03: 4-7/8\" x 11-5/8\", 2-1/8\" open top and bottom, 40 sq ft; 1994 Arena, Diamante and Quadra", "url": "https://www.hottuboutpost.com/dimension-one-40-square-foot-spa-filter-01561-03/" } ] }, { "brand": "Dimension One Spas", "model": "C-5404 cartridge (OEM 1561-09)", "series": "Dimension One Spas (ozone cartridge)", "oem_part_numbers": "1561-09", "oem": "1561-09", "equivalents": { "unicel": "C-5404", "pleatco": "PDO40-4", "filbur": "FC-3097" }, "dimensions": { "diameter_in": 5.5, "length_in": 17, "diameter_text": "5-1/2\"", "length_text": "17\"", "top_fitting": "1-15/16\" / open w/ 12 concentric holes", "bottom_fitting": "2-7/8\" / open", "square_feet": 40 }, "status": "verified", "not_in_sources": null, "notes": "Ozone cartridge with 12 concentric holes in the top cap (Unicel and Filbur).", "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/dimension-one-spas/c-5404/", "fitment": [ { "model": "Dimension One spas with the Crystal Pure water management system", "years": null, "note": null, "source_key": "hto" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Dimension One Spas section), PDF p.34 (printed p.30); spec table PDF p.11 (printed p.7)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Dimension One Spas, printed p.33 (PDF p.17)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Hot Tub Outpost (retailer OEM listing)", "where": "1561-09: 5.5\" x 17\", 1-15/16\" open top with 12 concentric holes, 2-7/8\" open bottom; all spas with the Crystal Pure water management system; replaces Unicel C-5404, Filbur FC-3097, Pleatco PDO40-4", "url": "https://www.hottuboutpost.com/dimension-one-40-square-foot-spa-filter-d1561-09/" } ] }, { "brand": "Dimension One Spas", "model": "C-7367 cartridge (OEM 1561-00)", "series": "Dimension One Spas (SpaBerry)", "oem_part_numbers": "1561-00", "oem": "1561-00", "equivalents": { "unicel": "C-7367", "pleatco": "PDO75-2000", "filbur": "FC-3059" }, "dimensions": { "diameter_in": 7.125, "length_in": 10.5, "diameter_text": "7-1/8\"", "length_text": "10-1/2\"", "top_fitting": "closed w/ Y stand-offs", "bottom_fitting": "2\" / open w/ twist lock", "square_feet": 75 }, "status": "verified", "not_in_sources": null, "notes": "Unicel and Filbur both flag this for Dimension One 75 models dated after 2000. Pleatco prints the size as 7-1/4\" x 10-5/8\" (castle top, open with twist lock) against Unicel's 7-1/8\" x 10-1/2\".", "row_last_changed": "2026-10-30", "model_page_url": "https://myspafilter.com/dimension-one-spas/c-7367/", "fitment": [ { "model": "Dimension One 75 (SpaBerry)", "years": "models dated after 2000", "note": "Unicel and Filbur", "source_key": "unicel" }, { "model": "Dimension One 75; @Home Hot Tubs", "years": null, "note": "Pleatco spec table, OEM 1561-00", "source_key": "pleatco" }, { "model": "Dimension One spas (universal EZ twist-lock filter)", "years": "2000–current", "note": null, "source_key": "hto" }, { "model": "@Home spas", "years": "2000 and newer", "note": null, "source_key": "hto" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Dimension One Spas section), PDF p.34 (printed p.30); spec table PDF p.18 (printed p.14)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47 (C-7367 = PDO75-2000); spec table PDF p.34 (OEM 1561-00, Dimension One 75, @Home Hot Tubs)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Dimension One Spas, printed p.33 (PDF p.17)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Hot Tub Outpost (retailer OEM listing)", "where": "01561-00: 7-1/8\" x 10-1/2\", closed castle top, 2\" open bottom with EZ twist lock, 75 sq ft; universal filter for 2000-current models, also @Home spas 2000 and newer; fits filter screen 01510-501", "url": "https://www.hottuboutpost.com/dimension-one-75-square-foot-spa-filter-01561-00/" } ] }, { "brand": "Dimension One Spas", "model": "C-7335 cartridge (OEM 1561-01)", "series": "Dimension One Spas (SpaBerry)", "oem_part_numbers": "1561-01", "oem": "1561-01", "equivalents": { "unicel": "C-7335", "pleatco": null, "filbur": "FC-3058" }, "dimensions": { "diameter_in": 7.125, "length_in": 5.875, "diameter_text": "7-1/8\"", "length_text": "5-7/8\"", "top_fitting": "closed w/ Y stand-offs", "bottom_fitting": "2\" / open w/ twist lock", "square_feet": 35 }, "status": "verified", "not_in_sources": "no Pleatco equivalent; Filbur length 5-1/8\" vs 5-7/8\" (Unicel and two retailers); no Dimension One document found giving 1561-01; no model-year fitment beyond SpaBerry in sources. Promoted 2026-11-03: OEM 1561-01 from two retailer listings that agree with Unicel's size, fittings and area", "notes": "Two spa retailers (Leisure Time Inc. and Enjoy Spa Pool) give the Dimension One OEM number as 1561-01 for the SpaBerry, with the same size, fittings and 35 sq ft as Unicel. Filbur calls FC-3058 \"SpaBerry 25\" in one table and \"Spa Berry 35\" in another, and prints the length as 5-1/8\" against Unicel's and both retailers' 5-7/8\"; its sq ft column says 35. Filbur prints N/A for Pleatco.", "row_last_changed": "2026-11-03", "model_page_url": "https://myspafilter.com/dimension-one-spas/c-7335/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Dimension One Spas section), PDF p.34 (printed p.30); spec table PDF p.18 (printed p.14)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Dimension One Spas, printed p.33 (PDF p.17)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Leisure Time Inc. (spa dealer listing)", "where": "Unicel C-7335 product page (fetched 2026-11-03): replaces Dimension One Spas OEM 1561-01 (SpaBerry); 7-1/8\" x 5-7/8\", closed top w/ Y stand-offs, 2\" open twist-lock bottom, 207 pleats, 3 oz, 35 sq ft; Filbur FC-3058", "url": "https://leisuretimeinc.com/products/unicel-c-7335-filter-cartridge" }, { "source": "Enjoy Spa Pool (retailer listing)", "where": "Filter cartridge 35 sq ft Dimension One (C-7335), fetched 2026-11-03: Spa Berry; 7-1/8\" x 5-7/8\"; closed top; 2\" open twist-lock bottom; 35 sq ft; 3 oz; OEM 1561-01; Unicel C-7335; Filbur FC-3058", "url": "https://www.enjoyspapool.com/product/filter-cartridge-35-sq-ft-dimension-one-c-7335/" } ] }, { "brand": "Nordic Hot Tubs", "model": "C-4301 cartridge", "series": "Nordic Hot Tubs (models dated before 7/99)", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-4301", "pleatco": "PMT27.5", "filbur": "FC-1610" }, "dimensions": { "diameter_in": 4.9375, "length_in": 14.875, "diameter_text": "4-15/16\"", "length_text": "14-7/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 28 }, "status": "verified", "not_in_sources": "no OEM part number in sources; no model/model-year fitment in sources", "notes": "Unicel and Filbur both say this is for Nordic models dated before 7/99. Neither source gives an OEM number.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/nordic-hot-tubs/c-4301/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Nordic Hot Tubs section), PDF p.46 (printed p.42); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47 (C-4301 = PMT27.5)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Nordic Hot Tubs, printed p.44 (PDF p.23)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Nordic Hot Tubs", "model": "C-4326 cartridge", "series": "Nordic Hot Tubs (models dated after 7/99)", "oem_part_numbers": "31CARTRIDGE", "oem": "31CARTRIDGE", "equivalents": { "unicel": "C-4326", "pleatco": "PRB25-IN", "filbur": "FC-2375" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 25 }, "status": "verified", "not_in_sources": "Nordic's chart does not use the catalogs' 7/99 date and gives no years for most models; Nordic's owner's manual lists Impulse under CARTRIDGE-E while the chart lists it here", "notes": "Unicel and Filbur both say this is for Nordic models dated after 7/99. Nordic Hot Tubs' own 2023 filter chart lists it as CARTRIDGE (sold as 31CARTRIDGE, 25 sq ft, in Nordic's 2022 parts list) = Unicel C-4326, Pleatco PRB25-IN, Filbur FC-2375, Waterway 817-2500. The chart says the Crown II, Crown XL, Escape MS/SE/LS, Impulse DP, Rendezvous LS, 110 Sport and Warrior XL models switched to CARTRIDGE-E (45 sq ft) after September 2021.", "row_last_changed": "2026-10-31", "model_page_url": "https://myspafilter.com/nordic-hot-tubs/c-4326/", "fitment": [ { "model": "Nordic Crown", "years": "before 2008", "note": "CARTRIDGE, 25 sq ft", "source_key": "nordic" }, { "model": "Nordic Warrior", "years": "before 2008", "note": "CARTRIDGE, 25 sq ft", "source_key": "nordic" }, { "model": "Nordic DLX, DLX w HS, Nordic, Nordic w HS, Omni, Insider, Quadra", "years": null, "note": "CARTRIDGE, 25 sq ft", "source_key": "nordic" }, { "model": "Nordic Escape, Escape R, Escape Pre, Escape Pre R", "years": null, "note": "CARTRIDGE, 25 sq ft", "source_key": "nordic" }, { "model": "Nordic Impulse, Rendezvous 1, Rendezvous 2, Sport", "years": null, "note": "CARTRIDGE, 25 sq ft", "source_key": "nordic" }, { "model": "Nordic Crown II, Crown XL, Escape MS, SE, LS, Impulse DP, Rendezvous LS, 110 Sport, Warrior XL, 110 Warrior XL", "years": "before Sept 2021", "note": "CARTRIDGE, 25 sq ft", "source_key": "nordic" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Nordic Hot Tubs section), PDF p.46 (printed p.42); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47 (C-4326 = PRB25-IN)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Nordic Hot Tubs, printed p.44 (PDF p.23)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Nordic Hot Tubs filter chart (2023)", "where": "CARTRIDGE row: Unicel C-4326, Pleatco PRB25-IN, Filbur FC-2375, Waterway 817-2500; model list, before/after Sept 2021 notes", "url": "https://www.nordichottubs.com/wp-content/uploads/2023/03/FILTER-CARTRIDGES-BY-MODEL-2023-3-8-23.pdf" }, { "source": "Nordic Hot Tubs 2022 service parts list", "where": "31CARTRIDGE, Cartridge, Filter, 25 SQ FT", "url": "https://www.nordichottubs.com/wp-content/uploads/2022/04/2022-North-American-Service-Parts-List_040722.pdf" } ] }, { "brand": "Nordic Hot Tubs", "model": "4CH-935 cartridge", "series": "Nordic Hot Tubs", "oem_part_numbers": "CARTRIDGE-T35; 31CARTRIDGE-T35", "oem": "CARTRIDGE-T35", "equivalents": { "unicel": "4CH-935", "pleatco": "PWW35L", "filbur": null }, "dimensions": { "diameter_in": 4.9375, "length_in": 9.25, "diameter_text": "4-15/16\"", "length_text": "9-1/4\"", "top_fitting": "v-groove semi-circular handle", "bottom_fitting": "2\" female SAE thread", "square_feet": 35 }, "status": "verified", "not_in_sources": "no Filbur equivalent (Nordic's chart prints NA); Pleatco's spec table prints PWW35L as 5\" x 8-1/2\" with a 1-1/2\" bottom, not 4-15/16\" x 9-1/4\"; Nordic's chart has no Crown entry for 2008-2014", "notes": "Nordic Hot Tubs' own 2023 filter chart lists CARTRIDGE-T35 as Unicel 4CH-935, Pleatco PWW35L and Waterway 817-4035, with no Filbur number. Nordic's owner's manual gives the same size: 9-1/4\" long, 4-15/16\" across, handle top, 2\" SAE female thread, 35 sq ft. Nordic's 2022 parts list sells it as 31CARTRIDGE-T35 for the Teleweir housing. Unicel's spec table says it fits a 1-1/2\" male SAE stand pipe.", "row_last_changed": "2026-10-31", "model_page_url": "https://myspafilter.com/nordic-hot-tubs/4ch-935/", "fitment": [ { "model": "Nordic Crown", "years": "after 2014", "note": "CARTRIDGE-T35, threaded 35 sq ft", "source_key": "nordic" }, { "model": "Nordic 110 Crown", "years": null, "note": "CARTRIDGE-T35, threaded 35 sq ft", "source_key": "nordic" }, { "model": "Nordic D'Amour: 110 D'Amour, D'Amour MS, D'Amour SE", "years": null, "note": "CARTRIDGE-T35, threaded 35 sq ft", "source_key": "nordic" }, { "model": "Nordic Encore: Encore, Encore Pre, 110 Encore, Encore MS, SE, LS", "years": null, "note": "CARTRIDGE-T35, threaded 35 sq ft", "source_key": "nordic" }, { "model": "Nordic Jubilee: 110 Jubilee, Jubilee MS, SE, LS", "years": null, "note": "CARTRIDGE-T35, threaded 35 sq ft", "source_key": "nordic" }, { "model": "Nordic Retreat: Retreat, 110 Retreat, Retreat MS, SE", "years": null, "note": "CARTRIDGE-T35, threaded 35 sq ft", "source_key": "nordic" }, { "model": "Nordic Stella: Stella, 110 Stella, Stella MS, SE", "years": null, "note": "CARTRIDGE-T35, threaded 35 sq ft", "source_key": "nordic" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Nordic Hot Tubs section), PDF p.46 (printed p.42); spec table PDF p.8 (printed p.4)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47 (4CH-935 = PWW35L)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Nordic Hot Tubs filter chart (2023)", "where": "CARTRIDGE-T35 row: Unicel 4CH-935, Pleatco PWW35L, Filbur NA, Waterway 817-4035; model list", "url": "https://www.nordichottubs.com/wp-content/uploads/2023/03/FILTER-CARTRIDGES-BY-MODEL-2023-3-8-23.pdf" }, { "source": "Nordic Hot Tubs owner's manual (01.2024)", "where": "Filter Quick Reference by Model, p.22: CARTRIDGE-T35, 9-1/4\" x 4-15/16\", handle top, 2\" SAE female thread, 35 sq ft", "url": "https://www.nordichottubs.com/wp-content/uploads/2024/02/Nordic-Hot-Tubs-Owners-Manual-01.2024.pdf" } ] }, { "brand": "Arctic Spas", "model": "C-4326 cartridge", "series": "Arctic Spas (Unicel lists Arctic under Blue Falls Mfg. Ltd., Canada)", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-4326", "pleatco": "PRB25-IN", "filbur": "FC-2375" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 25 }, "status": "verified", "not_in_sources": "no OEM part number in sources; no model/model-year fitment in sources", "notes": "Unicel has no Arctic table of its own and says \"see Blue Falls Mfg. Ltd. (Canada)\"; Filbur lists this part under both Arctic Spas and Blue Falls Mfg. Neither source gives an OEM number.", "row_last_changed": "2026-10-24", "model_page_url": "https://myspafilter.com/arctic-spas/c-4326/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference: Arctic Spas entry (PDF p.28, printed p.24) points to Blue Falls Mfg. Ltd. (Canada), PDF p.29 (printed p.25); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47 (C-4326 = PRB25-IN)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Arctic Spas, printed p.27 (PDF p.14)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Arctic Spas", "model": "C-4950 cartridge", "series": "Arctic Spas (Unicel lists Arctic under Blue Falls Mfg. Ltd., Canada)", "oem_part_numbers": "PRT-115LOT", "oem": "PRT-115LOT", "equivalents": { "unicel": "C-4950", "pleatco": "PRB50-IN", "filbur": "FC-2390" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "factory part number from one Arctic dealer only; Arctic's owner's manual gives no part numbers; other dealers date the drop-in era 1998-2008 and exclude the Marmot model from the disposable drop-in", "notes": "Unicel has no Arctic table of its own and says \"see Blue Falls Mfg. Ltd. (Canada)\"; Filbur lists this part under both Arctic Spas and Blue Falls Mfg. Arctic Spas Ontario sells the factory 50 sq ft pleated drop-in filter as PRT-115LOT and says it matches C-4950, PRB50-IN and FC-2390, for Arctic and most Coyote spas built in 2008 or earlier. The same dealer says these open-core cartridges do not fit the threaded intake used from 2009.", "row_last_changed": "2026-10-31", "model_page_url": "https://myspafilter.com/arctic-spas/c-4950/", "fitment": [ { "model": "Arctic Spas and most Coyote spas (drop-in filter)", "years": "2008 or earlier", "note": "factory pleated PRT-115LOT, 50 sq ft", "source_key": "arcticdealer" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference: Arctic Spas entry (PDF p.28, printed p.24) points to Blue Falls Mfg. Ltd. (Canada), PDF p.29 (printed p.25); spec table PDF p.9 (printed p.5)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47 (C-4950 = PRB50-IN); Filbur prints this as PRB50-/-MIN", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Arctic Spas, printed p.27 (PDF p.14)", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Arctic Spas Ontario (dealer)", "where": "Filter 50 Pleated Drop-In: PRT-115LOT, 50 sq ft, = C-4950 / PRB50-IN / FC-2390, Arctic and most Coyote spas 2008 or earlier", "url": "https://arcticspasontario.com/products/filter-50-pleated-drop-in" } ] }, { "brand": "Softub", "model": "6CH-25 cartridge (OEM 90-802)", "series": "Softub (also listed for Leisure Bay by Pleatco)", "oem_part_numbers": "90-802", "oem": "90-802", "equivalents": { "unicel": "6CH-25", "pleatco": "PTL20W-SV-P4", "filbur": "FC-0305" }, "dimensions": { "diameter_in": 6, "length_in": 5.5, "diameter_text": "6\"", "length_text": "5-1/2\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 25 }, "status": "verified", "not_in_sources": "sq ft rating differs between Unicel/Filbur (25) and Pleatco (20); Filbur files OEM 90-802 under Softsider Spas rather than Softub; no model-year fitment in sources", "notes": "Unicel rates 6CH-25 at 25 sq ft; Pleatco rates PTL20W-SV-P4 (same OEM 90-802, 6\" x 5-1/2\", handle, 1-1/2\" MPT) at 20 sq ft. The Filbur catalog lists FC-0305 against the same OEM 90-802 at 6\" x 5-1/2\", handle top, 1-1/2\" MPT, 25 sq ft, and cross-references it to PTL20W-SV-P-4 and 6CH-25. Size, OEM number and fitting agree across all three catalogs.", "row_last_changed": "2026-10-25", "model_page_url": "https://myspafilter.com/softub/6ch-25/", "fitment": [ { "model": "Softub; Leisure Bay (6 x 5-1/2, TSC)", "years": null, "note": "Pleatco spec table, OEM 90-802", "source_key": "pleatco" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Softub section), PDF p.55 (printed p.51); spec table PDF p.12 (printed p.8)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47 (6CH-25 = PTL20W-SV-P4); spec table PDF p.33 (Softub; Leisure Bay; 6 x 5-1/2, OEM 90-802)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Product by Pool/Spa Manufacturer (OEM), Softsider Spas (continued), printed p.50 (PDF p.26): FC-0305, 6 x 5-1/2, handle, OEM 90-802, PTL20W-SV-P-4, 6CH-25, 25 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Softub", "model": "4CH-20 cartridge", "series": "Softub", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "4CH-20", "pleatco": null, "filbur": null }, "dimensions": { "diameter_in": 4.625, "length_in": 6.75, "diameter_text": "4-5/8\"", "length_text": "6-3/4\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 20 }, "status": "unverified", "not_in_sources": "single source (Unicel only); no OEM part number; no Pleatco equivalent; no Filbur equivalent; no model/model-year fitment in sources. Checked 2026-10-31: Softub's 2025 owner's manual and Softub dealers (SoftubDirect, SpaStore, Simply Spas, ezhottubparts) describe snap-on 5020/5015/5010 filters, and the threaded replacement SoftubDirect sells is 4CH-23DF; retailer tables that list 4CH-20 for Softub repeat the Unicel size with no OEM number. Checked 2026-11-03: Hot Tub Essentials (ProAqua 4CH-20) and Hot Tub Outpost (ProLine P4CH-20) list Softub among the brands for this size with no Softub OEM number, in wording that matches Unicel's own listing; not an independent source. Checked 2026-11-04: Filbur lists FC-0125 / 4CH-20 under Saratoga (that row prints 15 sq ft), Leisure Bay (20 sq ft), Softsider (20 sq ft) and Vita (25 sq ft, OEM PVT-25), not under Softub. Pleatco lists Unicel's Saratoga OEM 20241-238 as PSG25P4 at 25 sq ft, not as a Softub part. Still no second source for the Softub application. Checked 2026-11-06: a pass over the Filbur catalog PDF found no row that prints Softub next to FC-0125 / 4CH-20. The size table still prints that Filbur number at 20 sq ft (Pleatco cell PHC25), and one brand row still prints Vita OEM PVT-25 at 25 sq ft. Checked 2026-11-07: Filbur still does not print Softub on an FC-0125 / 4CH-20 row. A Filbur brand row still pairs 4CH-20 with Vita OEM PVT-25. Still unresolved. Checked 2026-11-08: Unicel's Softub section still lists only this 20 sq ft 4-5/8\" x 6-3/4\" 1-1/2\" MPT cartridge, with no OEM. Pleatco's Softub spec line is PTL20W-SV-P4 for OEM 90-802, not 4CH-20. Filbur's text contains no Softub. Still unresolved.", "notes": "Unicel lists this 4-5/8\" x 6-3/4\" top-load cartridge for Softub. No OEM number is given, and neither Pleatco nor Filbur mentions Softub for it.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/softub/4ch-20/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Softub section), PDF p.55 (printed p.51); spec table PDF p.7 (printed p.3)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" } ] }, { "brand": "Intex", "model": "C-4317 cartridge (OEM 29001E)", "series": "Intex PureSpa Type S1 (inflatable spa)", "oem_part_numbers": "29001E; 29011E; 29001; 11692", "oem": "29001E", "equivalents": { "unicel": "C-4317", "pleatco": "PIN4PAIR", "filbur": null }, "dimensions": { "diameter_in": 4.25, "length_in": 2.9375, "diameter_text": "4-1/4\"", "length_text": "2-15/16\"", "top_fitting": "2-1/16\" / open", "bottom_fitting": "2-1/16\" / open", "square_feet": 4 }, "status": "unverified", "not_in_sources": "end-cap opening differs between Unicel (2-1/16\") and Pleatco (1-5/8\"); no Filbur equivalent found; checked 2026-11-01: retailer listings repeat either Unicel's or Pleatco's figure without their own measurement, so the conflict is unresolved Checked 2026-11-04: Pleatco's spec table still prints PIN4PAIR (OEM 29001E) with 1-5/8\" openings, and Unicel's C-4317 spec is still 2-1/16\". No new measurement. Unresolved. Checked 2026-11-06: All Filters' SpiroPure SP-PS-IT-S1 listing prints 1-5/8\" top and bottom holes for Intex 29001E / C-4317 / PIN4PAIR, which repeats Pleatco's figure rather than measuring Unicel's 2-1/16\". Checked 2026-11-07: Pleatco spec table PDF p.31 still prints PIN4PAIR (OEM 29001E) at 4-1/4\" × 2-15/16\" with 1-5/8\" openings. Unicel’s C-4317 spec still prints 2-1/16\" both ends. Still unresolved. Checked 2026-11-08: Pleatco spec table PDF p.31 still prints PIN4PAIR (OEM 29001E) at 4-1/4\" x 2-15/16\" with 1-5/8\" openings. Unicel's C-4317 spec still prints 2-1/16\" both ends. Filbur's text has no C-4317. Still unresolved.", "notes": "Intex sells this cartridge as Type S1: 29001E (twin pack), 29011E (six-pack) and single replacement part 11692. Unicel prints OEM 29001 and 11692; Pleatco prints 29001E for PIN4PAIR (a two-cartridge set). The end-cap openings differ between sources: Unicel gives 2-1/16\" top and bottom, Pleatco 1-5/8\". Body size (4-1/4\" x 2-15/16\") agrees. The model list is Intex's own compatible-item list for part 11692 (Intex names five of them as 2019 sets); the years shown are the model-year folders Intex's replacement-parts archive files part 11692 under. A Home Depot listing for 29001E also names 28413E, 28423E and 28443E, which are not on Intex's list. The EG/EH versions of 28425, 28427, 28439 and 28441 take the newer Type S2 cartridge instead.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/intex/c-4317/", "fitment": [ { "model": "Intex PureSpa 28403E", "years": "2017–2019, 2022–2026", "note": "Intex's list names it as a 2019 set", "source_key": "intex" }, { "model": "Intex PureSpa 28405E", "years": "2017, 2018", "note": "Intex's list names it as a 2019 set", "source_key": "intex" }, { "model": "Intex PureSpa 28407E", "years": "2017–2026", "note": "Intex's list names it as a 2019 set", "source_key": "intex" }, { "model": "Intex PureSpa 28409E", "years": "2017–2019", "note": "Intex's list names it as a 2019 set", "source_key": "intex" }, { "model": "Intex PureSpa 28413WL", "years": "2017, 2018, 2022–2026", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28421E", "years": "2016, 2024–2026", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28425E", "years": "2020–2022", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28427E", "years": "2020–2022", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28429E", "years": "2020–2022", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28431E", "years": "2020–2022", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28433EP", "years": null, "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28433WL", "years": null, "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28435E", "years": "2016, 2024–2026", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28439E", "years": "2020–2022", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28441E", "years": "2020–2022", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28453E", "years": "2017–2019", "note": "Intex's list names it as a 2019 set", "source_key": "intex" }, { "model": "Intex PureSpa 28455E", "years": "2017–2019", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28457E", "years": "2020–2022", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28457EP", "years": null, "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28461E", "years": "2020–2022", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28473E", "years": "2019–2026", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28475E", "years": "2021", "note": null, "source_key": "intex" }, { "model": "Intex SimpleSpa 28481E", "years": "2020–2022", "note": null, "source_key": "intex" }, { "model": "Intex PureSpa 28491E", "years": "2017, 2019–2021, 2024–2026", "note": null, "source_key": "intex" } ], "sources": [ { "source": "Intex (manufacturer replacement-part page)", "where": "11692, Spa Cartridge (S1): Compatible Item List of 24 PureSpa/SimpleSpa set numbers", "url": "https://intexcorp.com/replacement-parts/purespa/purespa-bubble-massage/77in-x-28in/11692-spa-s1-filter-cartridge/" }, { "source": "Intex (manufacturer product page)", "where": "Type S1 Hot Tub Filter Cartridge, SKU 29001E, described as the PureSpa replacement filter", "url": "https://intexcorp.com/products/spas/spa-accessories/filter-cartridge-s1-twin-pack/" }, { "source": "Intex (manufacturer product page)", "where": "Type S1 filter cartridge six-pack, SKU 29011E", "url": "https://intexcorp.com/products/spas/spa-accessories/filter-cartridge-s1-six-pack/" }, { "source": "Unicel 2026 Replacement Guide", "where": "OEM cross reference (Intex section), PDF p.40 (printed p.36)", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "spec table PDF p.31 (Intex EZ Set Pure Spa S1, OEM 29001E = PIN4PAIR)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Home Depot listing for Intex 29001E (retailer)", "where": "Compatible-models list: PureSpa 28403E, 28407E, 28443E, 28453E, 28421E, 28423E, 28413E (28413E, 28423E and 28443E are not on Intex's own list)", "url": "https://www.homedepot.com/p/Intex-4-25-in-Dia-Type-S1-Pool-Replacement-Filter-Cartridge-4-Pack-2-x-29001E/310718769" }, { "source": "Intex (manufacturer replacement-parts archive)", "where": "PureSpa set-number and model-year folders (2016–2026) that list part 11692", "url": "https://intexcorp.com/replacement-parts-archive/purespa/" } ] }, { "brand": "Bestway", "model": "Type VI cartridge (Bestway 58323)", "series": "Bestway Lay-Z-Spa and SaluSpa inflatable hot tubs", "oem_part_numbers": "58323; 58323E", "oem": "58323", "equivalents": { "unicel": null, "pleatco": null, "filbur": null }, "dimensions": { "diameter_in": 4.2, "length_in": 3.1, "diameter_text": "4.2\"", "length_text": "3.1\"", "top_fitting": "", "bottom_fitting": "", "square_feet": null }, "status": "verified", "not_in_sources": "no Unicel, Pleatco or Filbur equivalent; no end-cap opening size or sq ft rating; 58323 itself appears only on retailer listings (Bestway's current number is 60311)", "notes": "Bestway's US site gives the Type VI cartridge as Ø4.2\" x 3.1\" for its SaluSpa line, and the Lay-Z-Spa UK site sells the same Type VI cartridge as compatible with all Lay-Z-Spa hot tubs except the Monte Carlo, which takes its own rigid-spa cartridge. Neither Bestway page prints the part number; the Home Depot listing for the Bestway two-pack names it as 58323E-BW (4.2\" x 4.2\" x 3.1\"). The Unicel, Pleatco and Filbur catalogs do not list a Bestway Type VI equivalent, and no source gives an end-cap opening size or a sq ft rating. Bestway's own documents use other numbers for the same Type VI cartridge: 58239 (VI) in the 2013 Lay-Z-Spa manual, and item 60311 (10.6 x 8.0 cm, two per pack) in the 2021 and 2025 Lay-Z-Spa catalogs, sold today as BW60311 (Lay-Z-Spa UK) and 60311E (Bestway USA). The Monte Carlo cartridge is BWA0024, and the 2011 manual for the older #54075 and #54090 tubs lists a different cartridge, 58094.", "row_last_changed": "2026-11-01", "model_page_url": "https://myspafilter.com/bestway/58323/", "fitment": [ { "model": "Lay-Z-Spa Vegas #54112 and Monaco #54113", "years": "2013", "note": "printed as 58239 (VI), in filter set P6600", "source_key": "bwman" }, { "model": "Lay-Z-Spa AirJet: St. Lucia, Miami, Bahamas, Cancun, Tahiti, Ibiza, Honolulu, Hawaii, St. Moritz, Helsinki", "years": "2021", "note": "item 60311", "source_key": "bwcat" }, { "model": "Lay-Z-Spa AirJet Plus: Milan, Vancouver; HydroJet Pro: Hawaii, Maldives", "years": "2021", "note": "item 60311", "source_key": "bwcat" }, { "model": "Lay-Z-Spa Miami AirJet 4/6, Hollywood Luxe AirJet 6, Hawaii/Bali/Rome Smart AirJet 6 and 7", "years": "2025", "note": "item 60311", "source_key": "bwcat" }, { "model": "Lay-Z-Spa Dominica and Cabo Smart HydroJet 6; Santorini, Maldives, San Francisco Smart HydroJet Pro 7", "years": "2025", "note": "item 60311", "source_key": "bwcat" }, { "model": "Lay-Z-Spa Carrara Smart AirJet 6 and Toronto Smart AirJet 7 (ThermaCore)", "years": "2025", "note": "item 60311", "source_key": "bwcat" }, { "model": "Lay-Z-Spa hot tubs (all models except Monte Carlo)", "years": null, "note": null, "source_key": "layzspa" }, { "model": "Bestway SaluSpa inflatable hot tubs", "years": null, "note": "Bestway USA: “Bestway's line of SaluSpas”", "source_key": "bestway" } ], "sources": [ { "source": "Bestway USA (manufacturer product page)", "where": "SaluSpa Type VI Filter Cartridge 2-pack: size Ø4.2” x 3.1”, for Bestway's line of SaluSpas", "url": "https://bestwayusa.com/products/saluspa-type-vi-filter-cartridge-2-pack-1060311usx21" }, { "source": "Lay-Z-Spa UK (Bestway brand site)", "where": "Filter Cartridge VI: “Compatible with all Lay-Z-Spa hot tubs (Except Monte Carlo)”", "url": "https://www.lay-z-spa.co.uk/products/filter-cartridge-lay-z-spa-vi" }, { "source": "Lay-Z-Spa UK (Bestway brand site)", "where": "Separate rigid-spa filter cartridge sold for the Monte Carlo (no part number or size printed)", "url": "https://www.lay-z-spa.co.uk/products/rigid-spa-filter-cartridge" }, { "source": "Home Depot listing for Bestway Type VI (retailer)", "where": "Bestway Type VI SaluSpa filter cartridge 2-pack, model 2 x 58323E-BW; 4.2 in W x 4.2 in D x 3.1 in H", "url": "https://www.homedepot.com/p/Bestway-4-2-in-Dia-Type-VI-SaluSpa-Hot-Tub-Replacement-Pool-Filter-Cartridge-2-Pack-2-x-58323E-BW/310718619" }, { "source": "Bestway Lay-Z-Spa 2025 catalog (manufacturer)", "where": "Technical Features & Accessory Compatibility matrix: Filter Cartridge (60311) for every model; 60311 10.6 cm x 8.0 cm / 4.2\" x 3.1\"", "url": "https://www.lay-z-spa.no/25ss_LayZSpa.pdf" }, { "source": "Bestway Lay-Z-Spa Collection 2021 catalog (manufacturer)", "where": "box contents of all 14 models list filter cartridge (VI); spare 60311, 2 cartridges, 10.6 x 8.0 cm", "url": "https://bestway-store.ru/upload/bestwaycatalog/BESTWAY_2021_Lay-Z-Spa_bestway-store.ru.pdf" }, { "source": "Bestway Lay-Z-Spa owner’s manual 2013 (manufacturer)", "where": "Vegas #54112 / Monaco #54113: 58239(VI) Filter Cartridge, P6600 Filter Set", "url": "https://files.drinkstuff.com/pdf/BestwayLay-Z-SpaManual2013.pdf" } ] }, { "brand": "Intex", "model": "Type S2 cartridge (Intex 29012E)", "series": "Intex PureSpa Type S2 (newer PureSpa sets with the cartridge housed in the control unit)", "oem_part_numbers": "29012E; 13435", "oem": "29012E", "equivalents": { "unicel": null, "pleatco": null, "filbur": null }, "dimensions": { "diameter_in": 3.375, "length_in": 5.125, "diameter_text": "3-3/8\"", "length_text": "5-1/8\"", "top_fitting": "", "bottom_fitting": "", "square_feet": null }, "status": "verified", "not_in_sources": "no Unicel, Pleatco or Filbur equivalent; no sq ft rating or end-cap sizes; a Target listing prints a different size (3.5\" x 6.25\"); no model-year fitment", "notes": "Intex sells the Type S2 cartridge as 29012E (twin pack) and as single replacement part 13435. Intex gives the size as 3.375\" x 5.125\" and says the S2 is only for PureSpa models with the cartridge built into the control unit. Intex Italia describes it as having 65% more filter surface than the S1 and fitting only the newer models. A Target listing for 29012E prints 3.5\" x 6.25\" per filter, which does not match Intex's figure; the size shown here is Intex's. Note the suffix: Intex lists 28425E, 28427E, 28439E and 28441E under the S1 cartridge, but the EG/EH versions of those sets under S2.", "row_last_changed": "2026-10-25", "model_page_url": "https://myspafilter.com/intex/29012e/", "fitment": [ { "model": "Intex PureSpa 28425EG", "years": null, "note": "Olive Green Round Bubble, 4-person", "source_key": "intex" }, { "model": "Intex PureSpa 28425EH", "years": null, "note": "Sahara Tan Round Bubble, 4-person", "source_key": "intex" }, { "model": "Intex PureSpa 28427EG", "years": null, "note": "Olive Green Round Bubble, 6-person", "source_key": "intex" }, { "model": "Intex PureSpa 28427EH", "years": null, "note": "Sahara Tan Round Bubble, 6-person", "source_key": "intex" }, { "model": "Intex PureSpa 28439EH", "years": null, "note": "Greywood Deluxe Round Bubble, 4-person", "source_key": "intex" }, { "model": "Intex PureSpa 28441EH", "years": null, "note": "Greywood Deluxe Round Bubble, 6-person", "source_key": "intex" }, { "model": "Intex PureSpa 28449EH", "years": null, "note": "Greystone Deluxe Square Bubble, 4-person", "source_key": "intex" } ], "sources": [ { "source": "Intex (manufacturer product page)", "where": "Filter Cartridge S2 Twin Pack, SKU 29012E: 3.375\" x 5.125\"; “Only for PureSpa models with control unit cartridge integration”", "url": "https://intexcorp.com/spa-accessories/filter-cartridge-s2-twin-pack-for-spa/" }, { "source": "Intex (manufacturer replacement-part page)", "where": "13435, Spa Cartridge (S2): Compatible Item List 28425EG, 28425EH, 28427EG, 28427EH, 28439EH, 28441EH, 28449EH", "url": "https://intexcorp.com/replacement-parts/13435-spa-cartridge-s2/" }, { "source": "Intex Italia (manufacturer distributor page)", "where": "S2 cartridge: 65% more filter surface than S1; compatible only with new models with the cartridge housed in the motor unit", "url": "https://www.intexitalia.com/spa-idromassaggio/accessori-purespa/cartuccia-purespa-modello-s1-2-pezzi-29012/" }, { "source": "Target listing for Intex 29012E (retailer)", "where": "Specifications: each filter 3.5 in x 6.25 in (differs from Intex's 3.375\" x 5.125\")", "url": "https://www.target.com/p/intex-29012e-purespa-filter-cartridge-type-s2-for-various-purespa-models-2-pack/-/A-1001846352" } ] }, { "brand": "Beachcomber", "model": "C-4326 cartridge (SKU 3005845)", "series": "Beachcomber microfilter, 1995 to present", "oem_part_numbers": "3005845", "oem": "3005845", "equivalents": { "unicel": "C-4326", "pleatco": "PRB25-IN", "filbur": "FC-2375" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 25 }, "status": "verified", "not_in_sources": "Pleat count 107 (Beachcomber) vs 106 (Unicel); Pleatco outside diameter 5\" vs 4-15/16\"", "notes": "Beachcomber's 25 sq ft microfilter for hot tubs from 1995 to the present. Beachcomber and Unicel agree on 4-15/16\" x 13-5/16\", a 2-1/8\" open core and 3 oz media. Beachcomber counts 107 pleats; Unicel's spec table counts 106 for C-4326. Unicel calls C-4950 an upgrade of this body. Pleatco prints PRB25-IN at 5\" outside diameter and does not name Beachcomber.", "row_last_changed": "2026-11-04", "model_page_url": "https://myspafilter.com/beachcomber/c-4326/", "fitment": [ { "model": "Beachcomber hot tubs", "years": "1995 to present", "note": "25 sq ft microfilter; Beachcomber does not name a model", "source_key": "beach" } ], "sources": [ { "source": "Beachcomber Hot Tubs (manufacturer product page)", "where": "SKU 3005845: 25 sq ft, 4-15/16\" diameter, 2-1/8\" core, 13-5/16\" height, 107 pleats, 3 oz, 1995 to current", "url": "https://www.beachcomberhottubs.com/en_us/beachcomber-25-square-foot-medium" }, { "source": "Unicel 2026 Replacement Guide", "where": "Beachcomber OEM cross-reference, PDF p.29 (printed p.25): 3005845 = C-4326, 4-15/16\" x 13-5/16\", 25 sq ft, 3 oz; spec table PDF p.9 (printed p.5): 106 pleats, 2-1/8\" open ends", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47 (C-4326 = PRB25-IN); spec table PDF p.32 (5\" OD)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Beachcomber Spas, PDF p.15: FC-2375 = C-4326, 4-15/16\" x 13-5/16\", 25 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Beachcomber", "model": "C-4950 cartridge (SKU 3005815)", "series": "Beachcomber microfilter, 1995 to present", "oem_part_numbers": "3005815", "oem": "3005815", "equivalents": { "unicel": "C-4950", "pleatco": "PRB50-IN", "filbur": "FC-2390" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "Pleatco outside diameter 5\" vs 4-15/16\"; Beachcomber describes a finer strain and prints no micron", "notes": "Beachcomber's 50 sq ft microfilter, the same outside size as SKU 3005845, for hot tubs from 1995 to the present. Beachcomber counts 212 pleats of 3 oz fiber and says this cartridge has double the medium of the 25 sq ft model. Unicel's spec table also counts 212 pleats for C-4950 and calls it an upgrade of C-4326. Neither source prints a micron rating. Pleatco prints PRB50-IN at 5\" outside diameter.", "row_last_changed": "2026-11-04", "model_page_url": "https://myspafilter.com/beachcomber/c-4950/", "fitment": [ { "model": "Beachcomber hot tubs", "years": "1995 to present", "note": "50 sq ft microfilter; Beachcomber does not name a model", "source_key": "beach" } ], "sources": [ { "source": "Beachcomber Hot Tubs (manufacturer product page)", "where": "SKU 3005815: 50 sq ft, same 4-15/16\" x 13-5/16\" body and 2-1/8\" core, 212 pleats, 3 oz, 1995 to present; double the medium of the 25", "url": "https://www.beachcomberhottubs.com/en_us/microfilter-cartridge" }, { "source": "Unicel 2026 Replacement Guide", "where": "Beachcomber OEM cross-reference, PDF p.29 (printed p.25): 3005815 = C-4950, 4-15/16\" x 13-5/16\", 50 sq ft, 3 oz; spec table PDF p.9 (printed p.5): 212 pleats; note that C-4950 upgrades C-4326", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47 (C-4950 = PRB50-IN); spec table PDF p.32 (5\" OD)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Beachcomber Spas, PDF p.15: FC-2390 = C-4950, 4-15/16\" x 13-5/16\", 50 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Beachcomber", "model": "C-4401 cartridge (SKU 3005820)", "series": "Beachcomber two-piece microfilter, generally pre-1995", "oem_part_numbers": "3005820", "oem": "3005820", "equivalents": { "unicel": "C-4401", "pleatco": "PRB17.5SF-PAIR", "filbur": "FC-2386" }, "dimensions": { "diameter_in": 4.9375, "length_in": 4.625, "diameter_text": "4-15/16\"", "length_text": "4-5/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 35 }, "status": "verified", "not_in_sources": "Beachcomber prints no length; Pleatco outside diameter is 5\" and its JH-PAIR bottom hole is 2-3/16\" rather than 2-1/8\"", "notes": "Beachcomber sells SKU 3005820 as a two-piece 35 sq ft set for generally pre-1995 hot tubs with an upfront weir: the piece with the blue stem goes in first. The product page prints no diameter or length. Unicel and Filbur both size one cartridge at 4-15/16\" x 4-5/8\", open 2-1/8\" ends, two per set. Unicel's spec note says two cartridges per set with a stick handle, 158 pleats, 4 oz. Pleatco prints PRB17.5SF-PAIR at 5\" x 4-5/8\".", "row_last_changed": "2026-11-04", "model_page_url": "https://myspafilter.com/beachcomber/c-4401/", "fitment": [ { "model": "Beachcomber hot tubs with the upfront weir", "years": "generally pre-1995", "note": "two-piece 35 sq ft set; also some older off-brand spas", "source_key": "beach" } ], "sources": [ { "source": "Beachcomber Hot Tubs (manufacturer product page)", "where": "SKU 3005820: 35 sq ft, two pieces, blue stem installed first, generally pre-1995 upfront weir; no length printed", "url": "https://www.beachcomberhottubs.com/en_us/pos/genuine-parts/filtration-systems/microfilter-35-sq-ft" }, { "source": "Unicel 2026 Replacement Guide", "where": "Beachcomber OEM cross-reference, PDF p.29 (printed p.25): 3005820 = C-4401, 4-15/16\" x 4-5/8\", 35 sq ft, 4 oz; spec table PDF p.8 (printed p.4): 158 pleats, 2-1/8\" open, two per set with stick handle", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47; spec table PDF p.31 (5\" OD)", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Beachcomber Spas, PDF p.15: FC-2386 = C-4401, 4-15/16\" x 4-5/8\", 2/set, 35 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Beachcomber", "model": "C-4405 cartridge (SKU 3005825)", "series": "Beachcomber two-piece microfilter, generally pre-1995", "oem_part_numbers": "3005825", "oem": "3005825", "equivalents": { "unicel": "C-4405", "pleatco": "PRB25SF-PAIR", "filbur": "FC-2387" }, "dimensions": { "diameter_in": 4.9375, "length_in": 6.625, "diameter_text": "4-15/16\"", "length_text": "6-5/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "Beachcomber prints no length, and \"doubles\" does not match 35 sq ft to 50 sq ft; Pleatco outside diameter is 5\"", "notes": "Beachcomber's two-piece 50 sq ft set for the same generally pre-1995 upfront weir as SKU 3005820. The page says the 50 sq ft medium doubles filtration capacity and prints no length. Unicel and Filbur size it at 4-15/16\" x 6-5/8\", longer than the 35 sq ft pre-1995 cartridge, so it is not the same body with more pleats. Unicel counts 158 pleats and 4 oz, two per set. Pleatco prints PRB25SF-PAIR at 5\" x 6-5/8\".", "row_last_changed": "2026-11-04", "model_page_url": "https://myspafilter.com/beachcomber/c-4405/", "fitment": [ { "model": "Beachcomber hot tubs with the upfront weir", "years": "generally pre-1995", "note": "two-piece 50 sq ft set; also some older off-brand spas", "source_key": "beach" } ], "sources": [ { "source": "Beachcomber Hot Tubs (manufacturer product page)", "where": "SKU 3005825: 50 sq ft, two pieces, generally pre-1995 upfront weir; page says the medium doubles filtration capacity; no length printed", "url": "https://www.beachcomberhottubs.com/en_us/pos/genuine-parts/filtration-systems/2-x-50-sqft-microfilter-cartridge" }, { "source": "Unicel 2026 Replacement Guide", "where": "Beachcomber OEM cross-reference, PDF p.29 (printed p.25): 3005825 = C-4405, 4-15/16\" x 6-5/8\", 50 sq ft, 4 oz; spec table PDF p.8 (printed p.4): 158 pleats, two per set with stick handle", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel-to-Pleatco cross reference, PDF p.47; spec table PDF p.32 (5\" x 6-5/8\")", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Beachcomber Spas, PDF p.15: FC-2387 = C-4405, 4-15/16\" x 6-5/8\", 2/set, 50 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Strong Spas", "model": "4CH-925 cartridge (Antigua / Futura)", "series": "Strong Industries (catalogs name Antigua / Futura; Strong's FAQ does not)", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "4CH-925", "pleatco": "PSANT20P3", "filbur": "FC-0126" }, "dimensions": { "diameter_in": 4.625, "length_in": 7.25, "diameter_text": "4-5/8\"", "length_text": "7-1/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/2\" SAE", "square_feet": 20 }, "status": "verified", "not_in_sources": "Length disagrees: Unicel 7-1/4\", Pleatco 7-1/16\", Filbur FC-0126 8\". Outside diameter 4-5/8\" (Unicel) vs 4-3/4\" (Pleatco, Filbur). No Strong OEM number. Not the 50 or 75 sq ft filter in Strong's series FAQ.", "notes": "The 20 sq ft Strong cartridge in the catalogs, shown at Unicel's size. Pleatco lists PSANT20P3 for Futura Spa (Strong Industries) at 4-3/4\" x 7-1/16\", and its application index says Strong Antigua, 1.50\" SAE. Filbur's Strong section spells the model Antiqua and prints FC-0126 at 4-3/4\" x 8\", with the Unicel cell blank; a separate Filbur size table crosses FC-0126 to 4CH-925. Strong's FAQ does not mention this cartridge. Pleatco and Filbur also list an MPT version (PSANT20P4 / FC-0208) that is not 4CH-925.", "row_last_changed": "2026-11-04", "model_page_url": "https://myspafilter.com/strong-spas/4ch-925/", "fitment": [ { "model": "Strong Antigua / Futura Spa", "years": null, "note": "20 sq ft, 1-1/2\" SAE; Pleatco says Antigua, Filbur says Antiqua; not in Strong's FAQ", "source_key": "pleatco" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Strong Industries section, PDF p.58 (printed p.54): 4CH-925, 4-5/8\" x 7-1/4\", 1-1/2\" SAE, 20 sq ft, 3 oz, no model name; spec table PDF p.7 (printed p.3): 190 pleats, semi-circular handle", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.31: PSANT20P3 for Futura Spa (Strong Industries), 4-3/4\" x 7-1/16\", 1-1/2\" SAE, 20 sq ft; application index PDF p.27: Strong Antigua", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Strong Industries, PDF p.26 (printed p.51): FC-0126, 4-3/4\" x 8\", Antiqua, Unicel N/A; size table PDF p.9: FC-0126 = 4CH-925 = PSANT20P3", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Strong Spas (manufacturer FAQ)", "where": "What size filter does my spa use?: 50 or 75 sq ft by series and year, no part number, and no mention of Antigua, Futura or a 20 sq ft cartridge", "url": "https://strongspas.com/learning-center/hot-tub-info-guide/frequently-asked-questions/" } ] }, { "brand": "Freeflow Spas", "model": "4CH-22 cartridge (open top)", "series": "Freeflow Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "4CH-22", "pleatco": "PFF25W-P4", "filbur": "FC-2399" }, "dimensions": { "diameter_in": 4.9375, "length_in": 6.625, "diameter_text": "4-15/16\"", "length_text": "6-5/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 25 }, "status": "verified", "not_in_sources": "Model names are swapped: Unicel says TLX/RLX, Filbur and Pleatco's PFF25P4 say CLX. Pleatco equivalent is not one number (PFF25W-P4 on the cross-reference, PFF25P4 in Filbur). Outside diameter 4-15/16\" (Unicel, Filbur) vs 4-5/8\" (PFF25P4) vs 5\" (PFF25W-P4). No Freeflow OEM number in Unicel. FF-150 is Filbur/Pleatco only, so it is not an OEM lookup number.", "notes": "Unicel's spec table and Freeflow model list assign the open-top 4CH-22 to TLX and RLX: 4-15/16\" x 6-5/8\", 212 pleats, 3 oz, 25 sq ft, 1-1/2\" MPT. Filbur's size table and its Freedom Spas section assign that same open 4CH-22 / FC-2399 to CLX (and FF-150) and print Pleatco PFF25P4. Pleatco's own Unicel cross-reference prints 4CH-22 = PFF25W-P4, which Pleatco sizes at 5\" x 6-5/8\" for Lagas and does not name TLX, RLX or CLX. The dimension on this row is Unicel's.", "row_last_changed": "2026-11-07", "model_page_url": "https://myspafilter.com/freeflow-spas/4ch-22/", "fitment": [ { "model": "Freeflow TLX and RLX", "years": null, "note": "Unicel spec table and Freeflow model list: open top, 4CH-22", "source_key": "unicel" }, { "model": "Freeflow CLX", "years": null, "note": "Filbur FC-2399, open top, also numbered FF-150. Pleatco PFF25P4 names Lagas, CLX and FF-150. This is not Unicel's model assignment.", "source_key": "filbur" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Freeflow model list, PDF p.35 (printed p.31): TLX and RLX = 4CH-22; spec table PDF p.8 (printed p.4): open 2-1/8\", 212 pleats, 3 oz, 25 sq ft, model cell TLX, RLX", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel cross-reference PDF p.47: 4CH-22 = PFF25W-P4. Spec table PDF p.32: PFF25W-P4 at 5\" x 6-5/8\" for Lagas. Spec table PDF p.31: PFF25P4 at 4-5/8\" x 6-5/8\" for Lagas, CLX, FF-150", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Dimensional listing PDF p.9: FC-2399 open, CLX, PFF25P4, 4CH-22. Freedom Spas section PDF p.18 (printed p.35): CLX, FF-150", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Freeflow Spas", "model": "4CH-23 cartridge (closed top)", "series": "Freeflow Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "4CH-23", "pleatco": "PFF25TC-P4", "filbur": "FC-2400" }, "dimensions": { "diameter_in": 4.9375, "length_in": 6.625, "diameter_text": "4-15/16\"", "length_text": "6-5/8\"", "top_fitting": "closed", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 25 }, "status": "verified", "not_in_sources": "Unicel model is CLX; Filbur and Pleatco models are TLX and RLX (plus Lagas, FF-100, Claro). Diameter 4-15/16\" vs Pleatco 4-5/8\". No Freeflow OEM number in Unicel. FF-100 is Filbur/Pleatco only.", "notes": "Unicel's spec table assigns the closed-top 4CH-23 to Freeflow CLX: 4-15/16\" x 6-5/8\", 212 pleats, 3 oz, 25 sq ft, 1-1/2\" MPT. The Freeflow model list agrees. Filbur and Pleatco agree that 4CH-23 / FC-2400 / PFF25TC-P4 is the closed cartridge, and they assign it to TLX and RLX instead of CLX. Pleatco also names Lagas, FF-100 and Claro. Pleatco's outside diameter is 4-5/8\".", "row_last_changed": "2026-11-07", "model_page_url": "https://myspafilter.com/freeflow-spas/4ch-23/", "fitment": [ { "model": "Freeflow CLX", "years": null, "note": "Unicel spec table and model list: closed top, 4CH-23", "source_key": "unicel" }, { "model": "Freeflow TLX and RLX", "years": null, "note": "Filbur FC-2400, closed top, also numbered FF-100. Pleatco PFF25TC-P4 names Lagas, TLX, RLX, FF-100 and Claro.", "source_key": "filbur" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Freeflow model list, PDF p.35 (printed p.31): CLX = 4CH-23; spec table PDF p.8 (printed p.4): closed top, 212 pleats, 3 oz, 25 sq ft, model cell CLX", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel cross-reference PDF p.47: 4CH-23 = PFF25TC-P4. Spec table PDF p.31 and application index PDF p.27: closed cartridge for TLX and RLX", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Dimensional listing PDF p.9 and Freedom Spas section PDF p.18 (printed p.35): FC-2400 closed, TLX/RLX, FF-100, 4CH-23", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Freeflow Spas", "model": "5CH-45 cartridge (Legend)", "series": "Freeflow Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "5CH-45", "pleatco": "PFF50P4", "filbur": "FC-2401" }, "dimensions": { "diameter_in": 5.3125, "length_in": 10, "diameter_text": "5-5/16\"", "length_text": "10\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 45 }, "status": "verified", "not_in_sources": "Area 45 sq ft (Unicel, Filbur) vs 50 sq ft (Pleatco). Filbur diameter 5-5/16\" in the size table vs 5-1/4\" in the Freedom section. Passport is Unicel's model list only. Pleatco number PFF50P4 on the cross-reference vs PFF50P in Filbur's cell.", "notes": "Unicel's spec table prints 5CH-45 for Freeflow Legend: 5-5/16\" x 10\", open 2-1/8\", 1-1/2\" MPT, 225 pleats, 3 oz, 45 sq ft. The Freeflow model list puts Legend and Passport on that row. Passport is not in the spec-table model cell, and Filbur and Pleatco do not name Passport. Pleatco PFF50P4 is 50 sq ft. Filbur's size table is 5-5/16\" and 45 sq ft with Pleatco cell PFF50P; Filbur's Freedom Spas section prints the diameter as 5-1/4\".", "row_last_changed": "2026-11-07", "model_page_url": "https://myspafilter.com/freeflow-spas/5ch-45/", "fitment": [ { "model": "Freeflow Legend", "years": null, "note": "Unicel spec table. The model list also names Passport on this 5CH-45 row; Passport is not repeated in the spec-table model cell.", "source_key": "unicel" }, { "model": "Freeflow Legend", "years": null, "note": "Pleatco PFF50P4 at 50 sq ft. Filbur FC-2401 at 45 sq ft. Neither names Passport.", "source_key": "pleatco" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Freeflow model list, PDF p.35 (printed p.31): Legend and Passport = 5CH-45, 45 sq ft; spec table PDF p.11 (printed p.7): 225 pleats, model cell Legend, 5-5/16\" x 10\", open 2-1/8\"", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel cross-reference PDF p.47: 5CH-45 = PFF50P4. Spec table PDF p.32: 50 sq ft for Freeflow Spas Legend", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Dimensional listing PDF p.10: FC-2401 at 5-5/16\" x 10\", 45 sq ft. Freedom Spas section PDF p.18 (printed p.35): Legend at 5-1/4\" x 10\"", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Freedom Spas", "model": "4CH-30 cartridge", "series": "Freedom Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "4CH-30", "pleatco": "PTL25P-4", "filbur": "FC-0141" }, "dimensions": { "diameter_in": 4.625, "length_in": 11.875, "diameter_text": "4-5/8\"", "length_text": "11-7/8\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 30 }, "status": "verified", "not_in_sources": "Same Unicel number is 25 sq ft on the Sundance OEM line (6540-484) and 30 sq ft here. Franklin and Statesman are also named on 6CH-45. No Freedom OEM number. PTL25P-4 is not in Pleatco's Unicel cross-reference.", "notes": "Shown at 30 sq ft because that is Unicel's Freedom Spas line, Unicel's spec table (158 pleats, 4 oz), Filbur's size table and Aladdin 13005. Unicel's Sundance line prints the same 4CH-30 for OEM 6540-484 at 25 sq ft, and Filbur's Sundance line does too. Unicel names Franklin, Statesman and Revere. Aladdin's model field uses that same string and lists Freedom among many brands, including Dimension One and Sundance. Pleatco's Unicel cross-reference does not list 4CH-30; PTL25P-4 is Filbur's Pleatco cell.", "row_last_changed": "2026-11-07", "model_page_url": "https://myspafilter.com/freedom-spas/4ch-30/", "fitment": [ { "model": "Franklin, Statesman and Revere", "years": null, "note": "Unicel Freedom Spas line, 30 sq ft. The same two of those names are also on the 6CH-45 row.", "source_key": "unicel" }, { "model": "Franklin, Statesman and Revere", "years": null, "note": "Aladdin 13005 model field. Freedom Spas is one manufacturer in a multi-brand list. 30 sq ft, 158 pleats.", "source_key": "aladdin" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Freedom Spas line, PDF p.35 (printed p.31): Franklin, Statesman, Revere = 4CH-30, 30 sq ft, 4 oz; spec table PDF p.7 (printed p.3): 158 pleats, 30 sq ft, molded cone handle, 1-1/2\" MPT; Sundance line PDF p.59 (printed p.55): OEM 6540-484 at 25 sq ft", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Dimensional listing PDF p.9: FC-0141 at 30 sq ft. Freedom Spas section PDF p.18 (printed p.35): FC-0141, no Franklin/Statesman/Revere names", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Aladdin Equipment", "where": "Cartridge 13005, fetched 2026-11-06: model field 4CH-Top Load, Franklin, Statesman, Revere; 30 sq ft; 158 pleats; 4-5/8\" x 11-7/8\"; cone handle; 1-1/2\" male thread; Freedom Spas in the manufacturer list", "url": "https://www.aladdin1950.com/product/cartridge-filter-element-86/" } ] }, { "brand": "Freedom Spas", "model": "6CH-45 cartridge", "series": "Freedom Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "6CH-45", "pleatco": "PTL45W-P-4", "filbur": "FC-0330" }, "dimensions": { "diameter_in": 6, "length_in": 12.375, "diameter_text": "6\"", "length_text": "12-3/8\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/2” male thread/MPT", "square_feet": 45 }, "status": "verified", "not_in_sources": "Length 12-3/8\" (Unicel, Aladdin) vs 12-1/4\" (Filbur). Franklin and Statesman are also on the 4CH-30 row. No Freedom OEM number. PTL45W-P-4 is Filbur's Pleatco cell.", "notes": "Length is Unicel's 12-3/8\", which Aladdin 14506 also prints. Filbur's size table and Freedom Spas section print FC-0330 at 12-1/4\". Unicel names Statesman, Lexington, Enterprise, Aristocrat and Franklin. Aladdin's model field matches that string and names Freedom Spas and Master Spas. Pleatco's number here is Filbur's cell (PTL45W-P-4); Aladdin prints PTL45W-P4-4.", "row_last_changed": "2026-11-07", "model_page_url": "https://myspafilter.com/freedom-spas/6ch-45/", "fitment": [ { "model": "Statesman, Lexington, Enterprise, Aristocrat and Franklin", "years": null, "note": "Unicel Freedom Spas line, 6\" x 12-3/8\", 45 sq ft. Franklin and Statesman are also on 4CH-30.", "source_key": "unicel" }, { "model": "Statesman, Lexington, Enterprise, Aristocrat and Franklin", "years": null, "note": "Aladdin 14506. 6\" x 12-3/8\", 45 sq ft, 158 pleats. Also names Master Spas.", "source_key": "aladdin" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Freedom Spas line, PDF p.35 (printed p.31): Statesman, Lexington, Enterprise, Aristocrat, Franklin = 6CH-45, 6\" x 12-3/8\", 45 sq ft; spec table PDF p.12 (printed p.8): 158 pleats, 3 oz, semi-circular handle, 1-1/2\" MPT", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Dimensional listing PDF p.10 and Freedom Spas section PDF p.18 (printed p.35): FC-0330 at 6\" x 12-1/4\", 45 sq ft, PTL45W-P-4", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Aladdin Equipment", "where": "Cartridge 14506, fetched 2026-11-06: model field Statesman/Lexington/Enterprise/Aristocrat/Franklin; 45 sq ft; 158 pleats; 6\" x 12-3/8\"; Freedom Spas and Master Spas", "url": "https://www.aladdin1950.com/product/cartridge-filter-element-133/" } ] }, { "brand": "Freedom Spas", "model": "C-4401 cartridge (Liberty)", "series": "Freedom Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-4401", "pleatco": "PRB17.5SF-PAIR", "filbur": "FC-2386" }, "dimensions": { "diameter_in": 4.9375, "length_in": 4.625, "diameter_text": "4-15/16\"", "length_text": "4-5/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 35 }, "status": "verified", "not_in_sources": "Liberty is Unicel's Freedom list only. Filbur says Rainbow DSF 35, two per set. No Freedom OEM number. Duplicate of the Beachcomber C-4401 body.", "notes": "Unicel's Freedom list names Liberty only on this 35 sq ft row: 4-15/16\" x 4-5/8\", C-4401, 4 oz. The spec note says two cartridges per set with a stick handle. Filbur's Freedom section lists FC-2386 / C-4401 as Rainbow DSF 35, 2/set, and does not print Liberty. The same Unicel number is Beachcomber SKU 3005820. This row stays out of the search index because it has no Freedom OEM number and the model name is Unicel's alone.", "row_last_changed": "2026-11-07", "model_page_url": "https://myspafilter.com/freedom-spas/c-4401/", "fitment": [ { "model": "Liberty", "years": null, "note": "Unicel Freedom list only, on the 35 sq ft row. The following C-4405 row has no model name.", "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Freedom Spas line, PDF p.35 (printed p.31): Liberty = C-4401, 4-15/16\" x 4-5/8\", 35 sq ft, 4 oz; spec table PDF p.8 (printed p.4): two per set with stick handle", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel cross-reference PDF p.47: C-4401 = PRB17.5SF-JH-PAIR", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Freedom Spas section PDF p.18 (printed p.35): FC-2386, Rainbow DSF 35, 2/set, C-4401. No Liberty name", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Freedom Spas", "model": "C-4405 cartridge", "series": "Freedom Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-4405", "pleatco": "PRB25SF-PAIR", "filbur": "FC-2387" }, "dimensions": { "diameter_in": 4.9375, "length_in": 6.625, "diameter_text": "4-15/16\"", "length_text": "6-5/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "No model name. The 1993 note does not say it replaced Liberty's C-4401. Filbur calls it Rainbow DSF 50, not a Freedom model. Duplicate of the Beachcomber C-4405 body.", "notes": "Unicel's Freedom block prints this 50 sq ft row with a blank model cell: 4-15/16\" x 6-5/8\", C-4405, 4 oz. The note \"Model dated after 1993\" is the next line, under this row, not under Liberty. Filbur's Freedom section repeats that note on FC-2387 and calls the row Rainbow DSF 50, 2/set. Not indexed: no Freedom OEM number, no model name, and the body duplicates Beachcomber C-4405.", "row_last_changed": "2026-11-07", "model_page_url": "https://myspafilter.com/freedom-spas/c-4405/", "fitment": [ { "model": "Not named", "years": "Model dated after 1993", "note": "Unicel prints the note under this blank-model row. Filbur repeats the note on the Rainbow DSF 50 row.", "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Freedom Spas line, PDF p.35 (printed p.31): blank model cell, C-4405, 4-15/16\" x 6-5/8\", 50 sq ft, 4 oz, note \"Model dated after 1993\" under the row", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel cross-reference PDF p.47: C-4405 = PRB25SF-JH-PAIR", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Freedom Spas section PDF p.18 (printed p.35): FC-2387, Rainbow DSF 50, 2/set, same 1993 note", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Freedom Spas", "model": "C-4637 cartridge", "series": "Freedom Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-4637", "pleatco": "PRB37-IN-4", "filbur": "FC-2380" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 37 }, "status": "verified", "not_in_sources": "Concord, Patriot, Ambassador and Executive are Unicel's Freedom list only. Spec-table applications and Filbur do not use those names. The following C-4950 row, not this one, carries the 1993 note. No Freedom OEM number.", "notes": "Unicel's Freedom list names Concord, Patriot, Ambassador and Executive on this row only: 4-15/16\" x 13-5/16\", C-4637, 37 sq ft, 4 oz. The spec table gives 158 pleats, 2-1/8\" open ends, and calls 37 sq ft an upgrade of the 25 sq ft C-4326 and C-4625. The brands on that spec line are Rainbow, Waterway, Morgan, Leisure Bay and Custom Molded Products, not Freedom. Filbur's Freedom section calls FC-2380 Rainbow Dynamic 37 and does not print the Concord names. PRB37-IN-4 is Filbur's Pleatco cell.", "row_last_changed": "2026-11-07", "model_page_url": "https://myspafilter.com/freedom-spas/c-4637/", "fitment": [ { "model": "Concord, Patriot, Ambassador and Executive", "years": null, "note": "Unicel Freedom list only. Filbur's matching row says Rainbow Dynamic 37.", "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Freedom Spas line, PDF p.35 (printed p.31): Concord, Patriot, Ambassador, Executive = C-4637, 37 sq ft; spec table PDF p.9 (printed p.5): 158 pleats, 2-1/8\" open, upgrade of C-4326 and C-4625, application line does not name Freedom", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Freedom Spas section PDF p.18 (printed p.35): FC-2380, Rainbow Dynamic 37, PRB37-IN-4, C-4637, 37 sq ft. No Concord names", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Freedom Spas", "model": "C-4950 cartridge", "series": "Freedom Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "C-4950", "pleatco": "PRB50-IN", "filbur": "FC-2390" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "No model name. The 1993 note is not attached to the Concord names on C-4637. Duplicate of C-4950 rows under other brands.", "notes": "Unicel's Freedom block ends with this 50 sq ft row and a blank model cell. The note \"Model dated after 1993\" is under this row. Filbur repeats the note on FC-2390 and calls the row Rainbow Dynamic 50. The same open cartridge is used by other brands. Not indexed: no Freedom OEM number and no model name.", "row_last_changed": "2026-11-07", "model_page_url": "https://myspafilter.com/freedom-spas/c-4950/", "fitment": [ { "model": "Not named", "years": "Model dated after 1993", "note": "Unicel prints the note under this blank-model row. Filbur repeats it on Rainbow Dynamic 50.", "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Freedom Spas line, PDF p.35 (printed p.31): blank model cell, C-4950, 4-15/16\" x 13-5/16\", 50 sq ft, 3 oz, note \"Model dated after 1993\" under the row", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel cross-reference PDF p.47: C-4950 = PRB50-IN", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Freedom Spas section PDF p.18 (printed p.35): FC-2390, Rainbow Dynamic 50, same 1993 note", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "PDC Spas", "model": "C-4326 cartridge (OEM FLT-201TL)", "series": "Luxury, Premium, SE and LX", "oem_part_numbers": "FLT-201TL", "oem": "FLT-201TL", "equivalents": { "unicel": "C-4326", "pleatco": "PRB25-IN", "filbur": "FC-2375" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 25 }, "status": "verified", "not_in_sources": "Diameter 5\" (PDC, Pleatco) vs 4-15/16\" (Unicel, Filbur). Filbur’s PDC section prints C-4325 on the FC-2370 row; its size table prints FC-2370 as C-4625 and FC-2375 as C-4326.", "notes": "PDC’s 2025 guide: Luxury, Premium, SE and LX, 1990 to present, FLT-201TL, 25 sq ft, 5\" × 13-5/16\", 2-1/8\" holes, named as Unicel C-4326. Unicel’s spec table prints C-4326 at 4-15/16\" × 13-5/16\", 106 pleats, 3 oz, 25 sq ft. Pleatco prints PRB25-IN at 5\" × 13-5/16\". Filbur’s size table crosses FC-2375 to C-4326. Filbur’s PDC section prints FC-2370 as C-4325, which is a different, 11-7/8\" cartridge.", "row_last_changed": "2026-11-08", "model_page_url": "https://myspafilter.com/pdc-spas/c-4326/", "fitment": [ { "model": "Luxury, Premium, SE and LX", "years": "1990 to present", "note": "FLT-201TL, 25 sq ft open cartridge. PDC does not split these four series onto different parts.", "source_key": "pdc" } ], "sources": [ { "source": "PDC Spas (manufacturer filter guide, 2025)", "where": "Luxury, Premium, SE and LX, 1990–present: FLT-201TL, 25 sq ft, 5\" × 13-5/16\", 2-1/8\" holes, Unicel C-4326", "url": "https://media.cmsmax.cloud/qq67leqlk45sgt0rapx2j/Filter%20Guide%20for%20Web%202025.pdf" }, { "source": "Unicel 2026 Replacement Guide", "where": "PDC Spas block, PDF p.47 (printed p.43): C-4326, 4-15/16\" × 13-5/16\", 25 sq ft, 3 oz. Spec table PDF p.9 (printed p.5): 106 pleats, 2-1/8\" open ends. C-4625 is the 4 oz cartridge of the same size.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.32: PRB25-IN, 5\" × 13-5/16\", 3 oz, 25 sq ft. Cross-reference PDF p.47: C-4326 = PRB25-IN.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Size table PDF p.9 (printed p.17): FC-2375 = C-4326. PDC section printed p.45: FC-2370 printed as C-4325.", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "PDC Spas", "model": "C-4405 cartridge (OEM FLT-171-CART)", "series": "LifeStyle, XD2 spa side, and River", "oem_part_numbers": "FLT-171-CART", "oem": "FLT-171-CART", "equivalents": { "unicel": "C-4405", "pleatco": "PRB25SF-JH-PAIR", "filbur": "FC-2387" }, "dimensions": { "diameter_in": 4.9375, "length_in": 6.625, "diameter_text": "4-15/16\"", "length_text": "6-5/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 25 }, "status": "verified", "not_in_sources": "Area 25 sq ft (PDC; Pleatco single PRB25SF) vs 50 sq ft (Unicel OEM column; Filbur FC-2387; Pleatco pair). Diameter 5\" (PDC, Pleatco) vs 4-15/16\" (Unicel, Filbur). Filbur’s PDC section does not list this cartridge. Unicel’s PDC block does not list C-4405.", "notes": "Shown at 25 sq ft because that is what PDC’s 2025 guide prints for the element (LifeStyle, XD2 spa side, and River, 2010 to present), 5\" × 6-5/8\", 2-1/8\" holes, named as Unicel C-4405. Unicel’s OEM cross-reference prints 50 in the square-foot column for C-4405, and the spec note says two cartridges per set. The spec row itself does not print a square-foot figure. Pleatco prints PRB25SF at 25 sq ft for one cartridge and PRB25SF-JH-PAIR at 50 sq ft, and its cross sends C-4405 to the pair. Filbur prints FC-2387 at 50 sq ft, “6 sets,” with the same two-per-set note.", "row_last_changed": "2026-11-08", "model_page_url": "https://myspafilter.com/pdc-spas/c-4405/", "fitment": [ { "model": "LifeStyle, XD2 spa side, and River", "years": "2010 to present", "note": "FLT-171-CART. The XD2 cold side from 2024 is FLT-1000-CART, not this cartridge.", "source_key": "pdc" } ], "sources": [ { "source": "PDC Spas (manufacturer filter guide, 2025)", "where": "LifeStyle, XD2 spa side, and River, 2010–present: FLT-171-CART, 25 sq ft, 5\" × 6-5/8\", 2-1/8\" holes, Unicel C-4405", "url": "https://media.cmsmax.cloud/qq67leqlk45sgt0rapx2j/Filter%20Guide%20for%20Web%202025.pdf" }, { "source": "Unicel 2026 Replacement Guide", "where": "Spec table PDF p.8 (printed p.4): C-4405, 4-15/16\" × 6-5/8\", 158 pleats, 4 oz, two per set. OEM cross-reference prints 50 sq ft. PDC block does not list C-4405.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "PDF p.32: PRB25SF at 25 sq ft and PRB25SF-JH-PAIR at 50 sq ft. PDF p.47: C-4405 = PRB25SF-JH-PAIR.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "PDF p.9 (printed p.16): FC-2387 = C-4405, 50 sq ft, 6 sets, two per set.", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "PDC Spas", "model": "PRB7B cartridge (OEM FLT-118)", "series": "Timeless and XTR", "oem_part_numbers": "FLT-118", "oem": "FLT-118", "equivalents": { "unicel": null, "pleatco": "PRB7B", "filbur": null }, "dimensions": { "diameter_in": 5, "length_in": 4.625, "diameter_text": "5\"", "length_text": "4-5/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 17 }, "status": "verified", "not_in_sources": "Pleatco 2023: PRB7B deactivated, replacement N/A, no spec row. Unicel and Filbur list C-4401 at 35 sq ft and two per set for a cartridge of this length, and do not name PRB7B. No Unicel or Filbur equivalent is stored on this row.", "notes": "PDC’s 2025 guide is the only size: Timeless and XTR, 2000–2005, FLT-118, Pleatco PRB7B, 17 sq ft, 5\" × 4-5/8\", 2-1/8\" holes. Pleatco’s 2023 deactivated list prints PRB7B with replacement N/A, and the spec table has no PRB7B row. Unicel’s PDC block lists C-4401 at 35 sq ft, 4-15/16\" × 4-5/8\", two per set, and does not print FLT-118 or PRB7B. Filbur’s PDC section prints that C-4401 set (FC-2386) and does not print PRB7B. Pleatco does not say PRB7B was replaced by PRB17.5SF-PAIR.", "row_last_changed": "2026-11-08", "model_page_url": "https://myspafilter.com/pdc-spas/prb7b/", "fitment": [ { "model": "Timeless and XTR", "years": "2000–2005", "note": "FLT-118, Pleatco PRB7B, 17 sq ft. PDC names no Unicel number.", "source_key": "pdc" } ], "sources": [ { "source": "PDC Spas (manufacturer filter guide, 2025)", "where": "Timeless and XTR, 2000–2005: FLT-118, 17 sq ft, 5\" × 4-5/8\", 2-1/8\" holes, Pleatco PRB7B", "url": "https://media.cmsmax.cloud/qq67leqlk45sgt0rapx2j/Filter%20Guide%20for%20Web%202025.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Deactivated part numbers, PDF p.23: PRB7B replacement N/A", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Unicel 2026 Replacement Guide", "where": "PDC block, PDF p.47 (printed p.43): C-4401, 35 sq ft, 4-15/16\" × 4-5/8\". Spec note: two per set. No FLT-118.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "PDC section, printed p.45: FC-2386 = C-4401, 35 sq ft, two per set. No PRB7B.", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "PDC Spas", "model": "C-4310 cartridge (OEM FLT-101SK)", "series": "Nouveau", "oem_part_numbers": "FLT-101SK", "oem": "FLT-101SK", "equivalents": { "unicel": "C-4310", "pleatco": "PWW10", "filbur": "FC-3077" }, "dimensions": { "diameter_in": 4.25, "length_in": 4, "diameter_text": "4-1/4\"", "length_text": "4\"", "top_fitting": "2-1/16\" / open", "bottom_fitting": "2-1/16\" / open", "square_feet": 10 }, "status": "verified", "not_in_sources": "End openings 2-1/16\" (PDC, Unicel, Pleatco) vs 1-15/16\" (Filbur FC-3077).", "notes": "PDC’s 2025 guide: Nouveau, 1996–1999, FLT-101SK, 10 sq ft, 4-1/4\" × 4\", 2-1/16\" holes, Pleatco PWW10. Unicel prints the same size for C-4310 (216 pleats, 3 oz, 2-1/16\" both ends) and lists it on the PDC block. Pleatco’s cross sends C-4310 to PWW10 and prints PWW10 at 10 sq ft; PWW10PAIR is 20 sq ft and is not this row. Filbur prints FC-3077 at the same outside size with 1-15/16\" openings.", "row_last_changed": "2026-11-08", "model_page_url": "https://myspafilter.com/pdc-spas/c-4310/", "fitment": [ { "model": "Nouveau", "years": "1996–1999", "note": "FLT-101SK, 10 sq ft skim filter. Pleatco PWW10, not the 20 sq ft pair.", "source_key": "pdc" } ], "sources": [ { "source": "PDC Spas (manufacturer filter guide, 2025)", "where": "Nouveau, 1996–1999: FLT-101SK, 10 sq ft, 4-1/4\" × 4\", 2-1/16\" holes, Pleatco PWW10", "url": "https://media.cmsmax.cloud/qq67leqlk45sgt0rapx2j/Filter%20Guide%20for%20Web%202025.pdf" }, { "source": "Unicel 2026 Replacement Guide", "where": "PDC block and spec table PDF p.6 (printed p.2): C-4310, 4-1/4\" × 4\", 2-1/16\" open both ends, 216 pleats, 3 oz, 10 sq ft", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "PDF p.31: PWW10 at 10 sq ft, 2-1/16\" openings. PDF p.47: C-4310 = PWW10.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "PDF p.8 (printed p.15) and PDC section printed p.45: FC-3077, 1-15/16\" openings, C-4310, 10 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "PDC Spas", "model": "4CH-15 cartridge (OEM FLT-1000-CART)", "series": "XD1, XD1+ and XD2 cold side", "oem_part_numbers": "FLT-1000-CART; 817-0020", "oem": "FLT-1000-CART", "equivalents": { "unicel": "4CH-15", "pleatco": null, "filbur": null }, "dimensions": { "diameter_in": 4.625, "length_in": 5.1875, "diameter_text": "4-5/8\"", "length_text": "5-3/16\"", "top_fitting": "dual bar handle", "bottom_fitting": "1-1/2\" SAE", "square_feet": 15 }, "status": "verified", "not_in_sources": "Length 5-1/4\" (PDC) vs 5-3/16\" (Unicel). No Pleatco equivalent in the 2023 cross-reference. No Filbur PDC row. Top wording: PDC “bar type handle on closed top”; Unicel “dual bar handle.”", "notes": "PDC’s 2025 guide: XD1, XD1+ and the XD2 cold side, 2024 to present, FLT-1000-CART, 15 sq ft, 4-5/8\" × 5-1/4\", 1-1/2\" SAE on the bottom, bar handle on a closed top, Waterway 817-0020. Unicel’s Waterway line prints 817-0020 as 4CH-15 at 4-5/8\" × 5-3/16\", dual bar handle, 1-1/2\" SAE, 199 pleats, 3 oz, 15 sq ft. The length differs by 1/16\". The dimensions on this row are Unicel’s. Pleatco’s 2023 cross-reference has no 4CH-15 and no 817-0020. Filbur’s PDC section does not list it. The XD2 spa side is FLT-171-CART, not this cartridge.", "row_last_changed": "2026-11-08", "model_page_url": "https://myspafilter.com/pdc-spas/4ch-15/", "fitment": [ { "model": "XD1, XD1+ and XD2 cold side", "years": "2024 to present", "note": "FLT-1000-CART / Waterway 817-0020. Not the open XD2 spa-side cartridge.", "source_key": "pdc" } ], "sources": [ { "source": "PDC Spas (manufacturer filter guide, 2025)", "where": "XD Series, XD1, XD1+ and XD2 cold side, 2024–present: FLT-1000-CART, 15 sq ft, 4-5/8\" × 5-1/4\", 1-1/2\" SAE, bar handle, closed top, Waterway 817-0020", "url": "https://media.cmsmax.cloud/qq67leqlk45sgt0rapx2j/Filter%20Guide%20for%20Web%202025.pdf" }, { "source": "Unicel 2026 Replacement Guide", "where": "Waterway line: 817-0020 = 4CH-15, 4-5/8\" × 5-3/16\", 1-1/2\" SAE, 199 pleats, 3 oz, 15 sq ft. Spec table PDF p.6 (printed p.2): dual bar handle.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" } ] }, { "brand": "PDC Spas", "model": "4CH-949 cartridge (OEM FLT-SWIM50-CART)", "series": "Synergy, Summit, Splash, Vitality, and dual-zone hot-tub side", "oem_part_numbers": "FLT-SWIM50-CART", "oem": "FLT-SWIM50-CART", "equivalents": { "unicel": "4CH-949", "pleatco": "PWW50L", "filbur": "FC-0172" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.5, "diameter_text": "4-15/16\"", "length_text": "13-1/2\"", "top_fitting": "v-groove semi-circular handle", "bottom_fitting": "2\" female SAE thread", "square_feet": 50 }, "status": "verified", "not_in_sources": "Length 13-1/16\" (PDC) vs 13-3/16\" (Pleatco) vs 13-1/2\" (Unicel, Filbur). Thread wording: PDC and Pleatco 1-1/2\" female SAE; Unicel and Filbur 2\" female SAE, with Unicel’s note that it fits a 1-1/2\" male SAE standpipe. Diameter 5\" (PDC, Pleatco) vs 4-15/16\" (Unicel, Filbur). Not in Filbur’s PDC section.", "notes": "Dimensions shown are Unicel’s: 4-15/16\" × 13-1/2\", v-groove handle, 210 pleats, 3 oz, 50 sq ft, 2\" female SAE, note “For use on 1-1/2\" male SAE stand pipe.” PDC’s 2025 guide rates FLT-SWIM50-CART at 50 sq ft, 5\" × 13-1/16\", 1-1/2\" female SAE (38 mm), for Synergy, Summit, Splash, Vitality, and the hot-tub zone of dual-zone models, 2009 to present, and names Unicel 4CH-949. Pleatco prints PWW50L at 5\" × 13-3/16\", 1-1/2\" female SAE, 50 sq ft, OEM 817-4050. Unicel’s Waterway line also prints 817-4050 as 4CH-949. PDC does not print 817-4050. Filbur’s size table prints FC-0172 at Unicel’s 13-1/2\" and 2\" female SAE.", "row_last_changed": "2026-11-08", "model_page_url": "https://myspafilter.com/pdc-spas/4ch-949/", "fitment": [ { "model": "Synergy, Summit, Splash, Vitality, and the hot-tub zone of dual-zone models", "years": "2009 to present", "note": "FLT-SWIM50-CART, 50 sq ft top-mount. PDC names Unicel 4CH-949.", "source_key": "pdc" } ], "sources": [ { "source": "PDC Spas (manufacturer filter guide, 2025)", "where": "Synergy, Summit, Splash, Vitality, and the hot-tub zone of dual-zone models, 2009–present: FLT-SWIM50-CART, 50 sq ft, 5\" × 13-1/16\", 1-1/2\" female SAE (38 mm), Unicel 4CH-949", "url": "https://media.cmsmax.cloud/qq67leqlk45sgt0rapx2j/Filter%20Guide%20for%20Web%202025.pdf" }, { "source": "Unicel 2026 Replacement Guide", "where": "Spec table PDF p.9 (printed p.5): 4CH-949, 4-15/16\" × 13-1/2\", 210 pleats, 3 oz, 50 sq ft, 2\" female SAE, note for a 1-1/2\" male SAE standpipe. Waterway line: 817-4050 = 4CH-949.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "PDF p.32: PWW50L, 5\" × 13-3/16\", 1-1/2\" female SAE, 50 sq ft. PDF p.47: 4CH-949 = PWW50L.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "PDF p.9 (printed p.17): FC-0172 = 4CH-949, 13-1/2\", 2\" female SAE, 50 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "PDC Spas", "model": "C-4975 cartridge (OEM FLT-SWIM75-CART)", "series": "TruSwim", "oem_part_numbers": "FLT-SWIM75-CART", "oem": "FLT-SWIM75-CART", "equivalents": { "unicel": "C-4975", "pleatco": "PRB75", "filbur": "FC-2395" }, "dimensions": { "diameter_in": 4.9375, "length_in": 20.125, "diameter_text": "4-15/16\"", "length_text": "20-1/8\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 75 }, "status": "verified", "not_in_sources": "Center opening 2\" (PDC) vs 2-1/8\" (Unicel, Pleatco, Filbur). Diameter 5\" (PDC, Pleatco) vs 4-15/16\" (Unicel, Filbur). Not in Filbur’s PDC section or Unicel’s PDC block.", "notes": "PDC’s 2025 guide: TruSwim, 2016 to present, FLT-SWIM75-CART, 75 sq ft, 5\" × 20-1/8\", 2\" center hole, named as Unicel C-4975. Unicel’s spec table prints C-4975 at 4-15/16\" × 20-1/8\", 2-1/8\" open both ends, 210 pleats, 3 oz, 75 sq ft. Pleatco prints PRB75 at 5\" × 20-1/8\", 2-1/8\" both ends, 3 oz, 75 sq ft. Filbur prints FC-2395 at 4-15/16\" × 20-1/8\", 2-1/8\" open, 75 sq ft. The opening PDC prints (2\") is not the 2-1/8\" the three catalogs print. Dimensions on this row are Unicel’s.", "row_last_changed": "2026-11-08", "model_page_url": "https://myspafilter.com/pdc-spas/c-4975/", "fitment": [ { "model": "TruSwim", "years": "2016 to present", "note": "FLT-SWIM75-CART, 75 sq ft top-mount. PDC names Unicel C-4975.", "source_key": "pdc" } ], "sources": [ { "source": "PDC Spas (manufacturer filter guide, 2025)", "where": "TruSwim, 2016–present: FLT-SWIM75-CART, 75 sq ft, 5\" × 20-1/8\", 2\" center hole, Unicel C-4975", "url": "https://media.cmsmax.cloud/qq67leqlk45sgt0rapx2j/Filter%20Guide%20for%20Web%202025.pdf" }, { "source": "Unicel 2026 Replacement Guide", "where": "Spec table PDF p.9 (printed p.5): C-4975, 4-15/16\" × 20-1/8\", 2-1/8\" open both ends, 210 pleats, 3 oz, 75 sq ft. Not on the PDC block.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "PDF p.32: PRB75, 5\" × 20-1/8\", 2-1/8\", 75 sq ft. PDF p.47: C-4975 = PRB75.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "PDF p.9 (printed p.17): FC-2395 = C-4975, 4-15/16\" × 20-1/8\", 2-1/8\" open, 75 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Coleman Spas", "model": "4CH-252 cartridge (OEM FIL11100303)", "series": "Coleman Spas", "oem_part_numbers": "FIL11100303", "oem": "FIL11100303", "equivalents": { "unicel": "4CH-252", "pleatco": "PMA20-F2M", "filbur": null }, "dimensions": { "diameter_in": 4.625, "length_in": 8, "diameter_text": "4-5/8\"", "length_text": "8\"", "top_fitting": "molded cone handle", "bottom_fitting": "2\" male thread/MPT", "square_feet": 25 }, "status": "verified", "not_in_sources": "No Filbur row in the Coleman section. No Coleman model name. Pleatco's PMA20-F2M spec line does not print FIL11100303.", "notes": "Unicel's Coleman block prints OEM FIL11100303 as 4CH-252, 25 sq ft, 4-5/8\" x 8\", 2\" MPT, and notes that the Coleman original is 4-3/4\" OD. There is no 3301 twin on this row. The same OEM is also on Unicel's Cal Spas line. Pleatco's cross-reference sends 4CH-252 to PMA20-F2M. Filbur's Coleman section does not list FIL11100303.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/coleman-spas/4ch-252/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Coleman Spas OEM block, PDF p.32 (printed p.28): FIL11100303 = 4CH-252, 25 sq ft, 2\" MPT; original OD noted as 4-3/4\". Spec table: 4-5/8\" x 8\", cone handle, 213 pleats, 3 oz, 25 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Unicel cross-reference PDF p.47: 4CH-252 = PMA20-F2M", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Coleman Spas", "model": "7CH-32 cartridge (OEM 100432)", "series": "Coleman Spas", "oem_part_numbers": "100432; 3301-1018", "oem": "100432", "equivalents": { "unicel": "7CH-32", "pleatco": null, "filbur": "FC-0425" }, "dimensions": { "diameter_in": 7, "length_in": 8, "diameter_text": "7\"", "length_text": "8\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/2\" male thread/MPT", "square_feet": 32 }, "status": "verified", "not_in_sources": "No live Pleatco equivalent. PCS32P is Filbur's cell, and Pleatco's deactivated list sends PCS32P4 to N/A. No Coleman model name.", "notes": "This is the 1-1/2\" MPT half of Coleman's 7\" x 8\" pair. Unicel prints OEM 100432 and, for the through-2001 format, 3301-1018. The spec table gives 175 pleats, 3 oz and 32 sq ft. Filbur's Coleman section prints FC-0425, OEM 100432, Pleatco cell PCS32P, 32 sq ft. Pleatco's 2023 Unicel cross-reference has no 7CH-32 line. A Filbur Water's Edge row prints the same FC-0425 at 35 sq ft; the Coleman row is the 32.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/coleman-spas/7ch-32/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Coleman OEM block PDF p.32 (printed p.28): 100432 and 3301-1018 = 7CH-32, 7\" x 8\", 1-1/2\" MPT, 32 sq ft. Spec table PDF p.14 (printed p.10): 175 pleats, 3 oz, 32 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.16 and dimensional listing PDF p.11: FC-0425 = 7CH-32 = PCS32P, 32 sq ft, OEM 100432", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Coleman Spas", "model": "7CH-322 cartridge (OEM 100520)", "series": "Coleman Spas", "oem_part_numbers": "100520; 3301-2109", "oem": "100520", "equivalents": { "unicel": "7CH-322", "pleatco": "PAS35-F2M", "filbur": "FC-0420" }, "dimensions": { "diameter_in": 7, "length_in": 8, "diameter_text": "7\"", "length_text": "8\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2\" male thread/MPT", "square_feet": 32 }, "status": "verified", "not_in_sources": "Area 32 sq ft (Unicel spec table and Filbur) versus 35 sq ft (Pleatco PAS35-F2M, and Unicel's Artesian line). Length 8\" versus Pleatco's 7-9/16\". No Coleman model name.", "notes": "This is the 2\" MPT twin of OEM 100432. Unicel's spec table and Filbur print 7\" x 8\", 175 pleats, 32 sq ft, for OEM 100520, and Unicel also prints 3301-2109. Pleatco PAS35-F2M prints those same OEM numbers at 7-1/8\" x 7-9/16\", 2\" MPT, 35 sq ft. Unicel's Artesian line prints 7CH-322 at 35 sq ft and says the original is 7-7/8\" OD and 7-5/8\" overall. The dimensions stored here are the Coleman spec-table figures. Filbur's Pleatco cell says PAS35-2; Pleatco's own number is PAS35-F2M.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/coleman-spas/7ch-322/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Coleman OEM block PDF p.32: 100520 and 3301-2109 = 7CH-322, 7\" x 8\", 2\" MPT, 32 sq ft. Spec table PDF p.14: 175 pleats, 32 sq ft. Artesian block PDF p.29 (printed p.25): 7CH-322 at 35 sq ft, original 7-7/8\" OD and 7-5/8\" overall.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.34: PAS35-F2M, 7-1/8\" x 7-9/16\", 2\" MPT, 35 sq ft, OEM 100520 and 3301-2109. Cross-reference PDF p.47: 7CH-322 = PAS35-F2M.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.16 and dimensional listing PDF p.11: FC-0420, 7 x 8, 32 sq ft, OEM 100520, Pleatco cell PAS35-2, Unicel 7CH-322", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Coleman Spas", "model": "7CH-40 cartridge (OEM 100433)", "series": "Coleman Spas", "oem_part_numbers": "100433; 3301-1019", "oem": "100433", "equivalents": { "unicel": "7CH-40", "pleatco": null, "filbur": "FC-0435" }, "dimensions": { "diameter_in": 7, "length_in": 9.75, "diameter_text": "7\"", "length_text": "9-3/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/2\" male thread/MPT", "square_feet": 40 }, "status": "verified", "not_in_sources": "No live Pleatco equivalent. No Coleman model name. Vita is named on Unicel's spec line, not as a Coleman model.", "notes": "This is the 1-1/2\" MPT half of the 7\" x 9-3/4\" pair. Unicel prints OEM 100433 and 3301-1019. The spec table gives 178 pleats, 3 oz and 40 sq ft, and that line also names Vita Spas. Filbur's Coleman section prints FC-0435, OEM 100433, cell PCS40P, 40 sq ft. Pleatco's Unicel cross-reference has no 7CH-40 line.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/coleman-spas/7ch-40/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Coleman OEM block PDF p.32: 100433 and 3301-1019 = 7CH-40, 7\" x 9-3/4\", 1-1/2\" MPT, 40 sq ft. Spec table PDF p.14: 178 pleats, 40 sq ft, Coleman and Vita.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.16: FC-0435 = 7CH-40 = PCS40P, OEM 100433, 40 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Coleman Spas", "model": "7CH-402 cartridge (OEM 100521)", "series": "Coleman Spas", "oem_part_numbers": "100521; 3301-2110", "oem": "100521", "equivalents": { "unicel": "7CH-402", "pleatco": null, "filbur": "FC-0430" }, "dimensions": { "diameter_in": 7, "length_in": 9.75, "diameter_text": "7\"", "length_text": "9-3/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2\" male thread/MPT", "square_feet": 40 }, "status": "verified", "not_in_sources": "No live Pleatco equivalent. PCS40-F2M is deactivated with replacement N/A. No Coleman model name.", "notes": "This is the 2\" MPT twin of OEM 100433. Same 7\" x 9-3/4\" body, 178 pleats, 40 sq ft. Unicel prints OEM 100521 and 3301-2110. Filbur prints FC-0430 and cell PCS40-F2M. Pleatco's 2023 deactivated list sends PCS40-F2M to N/A, and the Unicel cross-reference has no 7CH-402 line. 7CH-40 is not a substitute: the thread is the difference.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/coleman-spas/7ch-402/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Coleman OEM block PDF p.32: 100521 and 3301-2110 = 7CH-402, 7\" x 9-3/4\", 2\" MPT, 40 sq ft. Spec table PDF p.14: 178 pleats, 40 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.16: FC-0430 = 7CH-402 = PCS40-F2M, OEM 100521, 40 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Deactivated list PDF p.22: PCS40-F2M replacement N/A. Unicel cross-reference PDF p.47 has no 7CH-402 line.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Coleman Spas", "model": "7CH-50 cartridge (OEM 100434)", "series": "Coleman Spas", "oem_part_numbers": "100434; 3301-1020", "oem": "100434", "equivalents": { "unicel": "7CH-50", "pleatco": null, "filbur": "FC-0463" }, "dimensions": { "diameter_in": 7, "length_in": 14.75, "diameter_text": "7\"", "length_text": "14-3/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/2\" male thread/MPT", "square_feet": 50 }, "status": "verified", "not_in_sources": "No live Pleatco equivalent. No Coleman model name.", "notes": "This is the 1-1/2\" MPT half of the 7\" x 14-3/4\" pair. Unicel prints OEM 100434 and 3301-1020. The spec table gives 144 pleats, 3 oz and 50 sq ft, and that line also names Vita Spas. Filbur prints FC-0463, cell PVT50P, 50 sq ft. Pleatco deactivates PVT50P4 with replacement N/A and does not list 7CH-50 in the Unicel cross-reference.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/coleman-spas/7ch-50/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Coleman OEM block PDF p.32: 100434 and 3301-1020 = 7CH-50, 7\" x 14-3/4\", 1-1/2\" MPT, 50 sq ft. Spec table PDF p.15 (printed p.11): 144 pleats, 50 sq ft, Coleman and Vita.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.16: FC-0463 = 7CH-50 = PVT50P, OEM 100434, 50 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Deactivated list PDF p.24: PVT50P4 replacement N/A. Unicel cross-reference has no 7CH-50 line.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Coleman Spas", "model": "7CH-502 cartridge (OEM 100522)", "series": "Coleman Spas", "oem_part_numbers": "100522; 3301-2111", "oem": "100522", "equivalents": { "unicel": "7CH-502", "pleatco": null, "filbur": "FC-0460" }, "dimensions": { "diameter_in": 7, "length_in": 14.75, "diameter_text": "7\"", "length_text": "14-3/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "2\" male thread/MPT", "square_feet": 50 }, "status": "verified", "not_in_sources": "No live Pleatco equivalent. PCS50-F2M replacement is N/A. No Coleman model name.", "notes": "This is the 2\" MPT twin of OEM 100434. Same 7\" x 14-3/4\" body, 144 pleats, 50 sq ft. Unicel prints OEM 100522 and 3301-2111. Filbur prints FC-0460 and cell PCS50-F2M. Pleatco deactivates PCS50-F2M with replacement N/A. The 1-1/2\" cartridge 7CH-50 is not a substitute.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/coleman-spas/7ch-502/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Coleman OEM block PDF p.32: 100522 and 3301-2111 = 7CH-502, 7\" x 14-3/4\", 2\" MPT, 50 sq ft. Spec table PDF p.15: 144 pleats, 50 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.16: FC-0460 = 7CH-502 = PCS50-F2M, OEM 100522, 50 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Deactivated list PDF p.22: PCS50-F2M replacement N/A", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Coleman Spas", "model": "C-4326 cartridge (OEM 100586)", "series": "Coleman Spas", "oem_part_numbers": "100586; 3301-2242", "oem": "100586", "equivalents": { "unicel": "C-4326", "pleatco": "PRB25-IN", "filbur": "FC-2375" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 25 }, "status": "verified", "not_in_sources": "Outside diameter 4-15/16\" (Unicel and Filbur) versus 5\" (Pleatco). No model name.", "notes": "Coleman's 25 sq ft open cartridge. Unicel prints OEM 100586 and 3301-2242 at 4-15/16\" x 13-5/16\". Filbur's Coleman section prints FC-2375, OEM 100586, PRB25-IN, C-4326, 25 sq ft. Pleatco's PRB25-IN spec lists OEM 100586 among other brands and prints the outside diameter as 5\". There is no Coleman model name. This is not the 50 sq ft C-4950, which is the same length.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/coleman-spas/c-4326/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Coleman OEM block PDF p.32: 100586 and 3301-2242 = C-4326, 25 sq ft, 4-15/16\" x 13-5/16\"", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.32: PRB25-IN lists OEM 100586, 5\" x 13-5/16\", open 2-1/8\", 25 sq ft", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.16: FC-2375, OEM 100586, PRB25-IN, C-4326, 25 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Coleman Spas", "model": "C-4339 cartridge (OEM 100585)", "series": "Coleman Spas", "oem_part_numbers": "100585; 3301-2241", "oem": "100585", "equivalents": { "unicel": "C-4339", "pleatco": null, "filbur": "FC-2915" }, "dimensions": { "diameter_in": 4.9375, "length_in": 11.25, "diameter_text": "4-15/16\"", "length_text": "11-1/4\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 40 }, "status": "verified", "not_in_sources": "No live Pleatco equivalent. PWW40 replacement is N/A. No Coleman model name.", "notes": "Coleman's 40 sq ft open cartridge, shorter than the 13-5/16\" pair. Unicel prints OEM 100585 and 3301-2241. The spec table gives 4-15/16\" x 11-1/4\", open 2-1/8\", 216 pleats, 3 oz, 40 sq ft, and describes it as Waterway. Filbur's Coleman section repeats OEM 100585, calls the row Waterway 40, and prints Pleatco cell PWW40. Pleatco deactivates PWW40 with replacement N/A.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/coleman-spas/c-4339/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Coleman OEM block PDF p.32: 100585 and 3301-2241 = C-4339, 40 sq ft, 4-15/16\" x 11-1/4\". Spec table: 216 pleats, open 2-1/8\", 40 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.16: FC-2915, OEM 100585, PWW40, C-4339, 40 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Deactivated list PDF p.25: PWW40 replacement N/A", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Coleman Spas", "model": "C-4950 cartridge (OEM 100533)", "series": "Coleman Spas", "oem_part_numbers": "100533; 3301-2145", "oem": "100533", "equivalents": { "unicel": "C-4950", "pleatco": "PRB50-IN", "filbur": "FC-2390" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "Outside diameter 4-15/16\" (Unicel and Filbur) versus 5\" (Pleatco). No model name on the Coleman row or the Maax row.", "notes": "Coleman's 50 sq ft open cartridge, the same length as the 25 sq ft OEM 100586. Unicel prints OEM 100533 and 3301-2145. The same 100533 is on the Maax Spas of AZ list with no model name. Filbur prints FC-2390 and cell PRB50-IN. Pleatco prints the outside diameter as 5\".", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/coleman-spas/c-4950/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Coleman OEM block PDF p.32: 100533 and 3301-2145 = C-4950, 50 sq ft, 4-15/16\" x 13-5/16\". Maax Spas of AZ, PDF p.44, repeats OEM 100533 with no model name.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.32: PRB50-IN lists OEM 100533, 5\" OD, 50 sq ft", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.16: FC-2390, OEM 100533, PRB50-IN, C-4950, 50 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Coleman Spas", "model": "C-8450 cartridge (OEM 100593)", "series": "Coleman Spas", "oem_part_numbers": "100593; 3301-2261", "oem": "100593", "equivalents": { "unicel": "C-8450", "pleatco": "PCS50N", "filbur": "FC-3310" }, "dimensions": { "diameter_in": 8, "length_in": 9, "diameter_text": "8\"", "length_text": "9\"", "top_fitting": "2-1/16\" / open", "bottom_fitting": "2\" male slip fitting", "square_feet": 50 }, "status": "verified", "not_in_sources": "Opening 2-1/16\" (Unicel and Filbur) versus 2-1/8\" (Pleatco). The after-1992 note is on the Coleman row. Maax's copy of OEM 100593 does not repeat it. No model name.", "notes": "Coleman's 50 sq ft slip cartridge. The note under Unicel's row says the model is dated after 1992. OEM numbers are 100593 and 3301-2261. The spec table gives 8\" x 9\", a 2-1/16\" opening, a 2\" male slip, 193 pleats, 3 oz and 50 sq ft. Pleatco PCS50N prints the opening as 2-1/8\" and lists both OEM numbers. Filbur repeats the after-1992 note. Maax lists 100593 and does not repeat that date.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/coleman-spas/c-8450/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Coleman OEM block PDF p.32: 100593 and 3301-2261 = C-8450, 50 sq ft, 8\" x 9\", 2\" male slip, note \"Model dated after 1992.\" Spec table PDF p.20 (printed p.16): 2-1/16\" open, 193 pleats, 50 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.35: PCS50N, 8\" x 9\", 2-1/8\" open, 2\" slip, OEM 100593 and 3301-2261, 50 sq ft", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.16: FC-3310, OEM 100593, PCS50N, C-8450, 50 sq ft, model dated after 1992", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Coleman Spas", "model": "C-8475 cartridge (OEM 100594)", "series": "Coleman Spas", "oem_part_numbers": "100594; 3301-2262", "oem": "100594", "equivalents": { "unicel": "C-8475", "pleatco": "PCS75N", "filbur": "FC-3320" }, "dimensions": { "diameter_in": 8, "length_in": 13, "diameter_text": "8\"", "length_text": "13\"", "top_fitting": "2-1/16\" / open", "bottom_fitting": "2\" male slip fitting", "square_feet": 75 }, "status": "verified", "not_in_sources": "Opening 2-1/16\" (Unicel and Filbur) versus 2-1/8\" (Pleatco). The after-1992 note is Coleman's. No model name.", "notes": "Coleman's 75 sq ft slip cartridge, the longer partner of OEM 100593. Unicel's note says the model is dated after 1992. OEM numbers are 100594 and 3301-2262. The spec table gives 8\" x 13\", a 2-1/16\" opening, a 2\" male slip, 197 pleats and 75 sq ft. Pleatco PCS75N prints a 2-1/8\" opening. A 2\" slip is not the 2\" MPT used on 7CH-322, 7CH-402 or 7CH-502.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/coleman-spas/c-8475/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Coleman OEM block PDF p.32: 100594 and 3301-2262 = C-8475, 75 sq ft, 8\" x 13\", 2\" male slip, note \"Model dated after 1992.\" Spec table PDF p.20: 2-1/16\" open, 197 pleats, 75 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.35: PCS75N, 8\" x 13\", 2-1/8\" open, 2\" slip, OEM 100594 and 3301-2262, 75 sq ft", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.17: FC-3320, OEM 100594, PCS75N, C-8475, 75 sq ft, model dated after 1992", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Maax Spas", "model": "5CH-25 cartridge (OEM 108868)", "series": "Maax Spas of AZ", "oem_part_numbers": "108868", "oem": "108868", "equivalents": { "unicel": "5CH-25", "pleatco": "PMAX25P4", "filbur": null }, "dimensions": { "diameter_in": 5.625, "length_in": 6, "diameter_text": "5-5/8\"", "length_text": "6\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/2\" male thread/MPT", "square_feet": 25 }, "status": "verified", "not_in_sources": "Diameter 5-5/8\" (Unicel) versus 5-3/4\" (Pleatco). No Filbur equivalent found.", "notes": "Unicel's Maax Spas of AZ list puts Elegant, Intrigue and Joli on one cartridge: 25 sq ft, 5-5/8\" x 6\", 1-1/2\" MPT, OEM 108868, 5CH-25. The spec table adds 201 pleats and 3 oz. Pleatco PMAX25P4 lists OEM 108868 at 5-3/4\" x 6\", still 25 sq ft and still 1-1/2\" MPT. A text search of the Filbur catalog found no 5CH-25, no PMAX25 and no 108868.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/maax-spas/5ch-25/", "fitment": [ { "model": "Elegant", "years": null, "note": "OEM 108868, 25 sq ft, on the same line as Intrigue and Joli", "source_key": "unicel" }, { "model": "Intrigue", "years": null, "note": "Same cartridge as Elegant and Joli", "source_key": "unicel" }, { "model": "Joli", "years": null, "note": "Same cartridge as Elegant and Intrigue. Not the Elite cartridge.", "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Maax Spas of AZ, PDF p.44 (printed p.40): Elegant, Intrigue and Joli = 108868 = 5CH-25, 25 sq ft, 5-5/8\" x 6\", 1-1/2\" MPT. Spec table PDF p.11 (printed p.7): 201 pleats, 3 oz, 25 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.32: PMAX25P4, OEM 108868, 5-3/4\" x 6\", 1-1/2\" MPT, 25 sq ft. Cross-reference PDF p.47: 5CH-25 = PMAX25P4.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Maax Spas", "model": "5CH-35 cartridge (OEM 104309)", "series": "Maax Spas of AZ", "oem_part_numbers": "104309", "oem": "104309", "equivalents": { "unicel": "5CH-35", "pleatco": "PMAX50P4", "filbur": "FC-0300" }, "dimensions": { "diameter_in": 5.625, "length_in": 8, "diameter_text": "5-5/8\"", "length_text": "8\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/2\" male thread/MPT", "square_feet": 35 }, "status": "verified", "not_in_sources": "Unicel prints 35 sq ft on the spec table and the Maax of AZ line (with OEM 104309) and 50 sq ft on the Elite Spas by Maax heading (no OEM). Pleatco's cross-reference number PMAX50P4 is 50 sq ft. PAS35P4 is 35 sq ft at 5-7/8\" x 7-3/4\". Filbur is 35 sq ft and does not print OEM 104309.", "notes": "Unicel's Maax of AZ line names Elite Spas on OEM 104309, 5CH-35, 35 sq ft, 5-5/8\" x 8\", 1-1/2\" MPT. The spec table agrees: 203 pleats, 3 oz, 35 sq ft. A separate heading, Elite Spas by Maax, prints 50 sq ft for the same diameter, length, thread and Unicel number, and prints no OEM. Pleatco's cross-reference sends 5CH-35 to PMAX50P4, specified at 5-3/4\" x 8\", 50 sq ft, for Maax Spas of Canada, with no OEM. Pleatco also prints PAS35P4 for Elite Spas (Coleman) at 5-7/8\" x 7-3/4\", 35 sq ft, with no OEM. Filbur FC-0300 is 5-5/8\" x 8\", 35 sq ft, and its Pleatco cell is PAS35P. The square feet stored here are the spec table's 35. PMAX50P4 is not that 35 sq ft cartridge.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/maax-spas/5ch-35/", "fitment": [ { "model": "Elite Spas", "years": null, "note": "Maax of AZ line: OEM 104309 at 35 sq ft. A separate Unicel heading prints 50 sq ft and no OEM.", "source_key": "unicel" } ], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Maax Spas of AZ PDF p.44: Elite Spas, 104309, 5CH-35, 35 sq ft, 5-5/8\" x 8\", 1-1/2\" MPT. Spec table PDF p.11: 203 pleats, 35 sq ft. Heading Elite Spas by Maax, PDF p.34 (printed p.30): 50 sq ft, same body, no OEM.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "PDF p.47: 5CH-35 = PMAX50P4. PDF p.32: PMAX50P4 at 50 sq ft (Maax of Canada) and PAS35P4 at 35 sq ft (Elite Spas, Coleman), 5-7/8\" x 7-3/4\".", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "FC-0300, PDF p.16 and p.18: 5-5/8\" x 8\", 35 sq ft, PAS35P, 5CH-35, Elite Spa by Coleman / Maax/Coleman Spas", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Maax Spas", "model": "C-4950 cartridge (OEM 100533)", "series": "Maax Spas of AZ", "oem_part_numbers": "100533", "oem": "100533", "equivalents": { "unicel": "C-4950", "pleatco": "PRB50-IN", "filbur": "FC-2390" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 50 }, "status": "verified", "not_in_sources": "No model name. Outside diameter 4-15/16\" versus Pleatco's 5\". The 3301-2145 twin is on the Coleman row only.", "notes": "Maax of AZ prints OEM 100533 on a 50 sq ft, 4-15/16\" x 13-5/16\" line and names no model. The heading says see also Coleman Spas. Coleman's block pairs 100533 with 3301-2145. This Maax row does not add the 3301 number, because Unicel does not print it under Maax. Pleatco's outside diameter for PRB50-IN is 5\".", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/maax-spas/c-4950/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Maax Spas of AZ PDF p.44: 100533 = C-4950, 50 sq ft, 4-15/16\" x 13-5/16\", no model name. The heading says see also Coleman Spas.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.32: PRB50-IN includes OEM 100533", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.16: FC-2390, OEM 100533, C-4950. No separate Maax heading for this OEM.", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Maax Spas", "model": "C-5374 cartridge (OEM 107092)", "series": "Maax Spas of AZ", "oem_part_numbers": "107092", "oem": "107092", "equivalents": { "unicel": "C-5374", "pleatco": "PLBS75", "filbur": "FC-2971" }, "dimensions": { "diameter_in": 5.3125, "length_in": 14.8125, "diameter_text": "5-5/16\"", "length_text": "14-13/16\"", "top_fitting": "2-1/8\" / open", "bottom_fitting": "2-1/8\" / open", "square_feet": 65 }, "status": "verified", "not_in_sources": "Area 65 sq ft (Unicel spec table, the Maax line, and Filbur) versus 75 sq ft (Pleatco's PLBS75 spec, and Unicel's S2/G2 line). Length 14-13/16\" (Unicel), 14-3/4\" (Pleatco) or 14-11/16\" (Filbur). No Maax model name. 107092 is not on the Pleatco spec line.", "notes": "Maax of AZ prints OEM 107092 as C-5374, 65 sq ft, 5-5/16\" x 14-13/16\", with no model name. Unicel's spec table gives 223 pleats, 3 oz, 65 sq ft, open 2-1/8\", for Rec Warehouse S2/G2, Rainbow and Waterway. The S2/G2 OEM line in the same guide prints 75 sq ft for C-5374. Pleatco's cross-reference says C-5374 = PLBS75, and the PLBS75 spec is 5-5/16\" x 14-3/4\", 75 sq ft, with OEM 817-0015, 303433 and R173600, not 107092. Filbur FC-2971 is 5-5/16\" x 14-11/16\" and 65 sq ft. The size stored here is Unicel's spec table.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/maax-spas/c-5374/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Maax Spas of AZ PDF p.44: 107092 = C-5374, 65 sq ft, 5-5/16\" x 14-13/16\". Spec table PDF p.11: 223 pleats, 65 sq ft. S2/G2 line PDF p.43 (printed p.39): C-5374 at 75 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "PDF p.47: C-5374 = PLBS75. PDF p.32: PLBS75 at 75 sq ft, 5-5/16\" x 14-3/4\", OEM 817-0015, 303433, R173600.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "FC-2971: 5-5/16\" x 14-11/16\", 65 sq ft, PLBS75, C-5374", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Maax Spas", "model": "C-8450 cartridge (OEM 100593)", "series": "Maax Spas of AZ", "oem_part_numbers": "100593", "oem": "100593", "equivalents": { "unicel": "C-8450", "pleatco": "PCS50N", "filbur": "FC-3310" }, "dimensions": { "diameter_in": 8, "length_in": 9, "diameter_text": "8\"", "length_text": "9\"", "top_fitting": "2-1/16\" / open", "bottom_fitting": "2\" male slip fitting", "square_feet": 50 }, "status": "verified", "not_in_sources": "No model name. Opening 2-1/16\" versus 2-1/8\". The after-1992 note and 3301-2261 are on the Coleman row only.", "notes": "Maax of AZ lists OEM 100593 as C-8450, 50 sq ft, 8\" x 9\", 2\" male slip, and names no model. It does not print the model-dated-after-1992 sentence. That sentence is under Coleman's copy of the same OEM, which also prints 3301-2261. This row does not copy the date or the 3301 number onto Maax. Pleatco's opening is 2-1/8\". Unicel and Filbur print 2-1/16\".", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/maax-spas/c-8450/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Maax Spas of AZ PDF p.44: 100593 = C-8450, 50 sq ft, 8\" x 9\", 2\" male slip, no model and no year note. Spec table PDF p.20: 2-1/16\" open, 193 pleats.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.35: PCS50N, OEM 100593 and 3301-2261, 2-1/8\" opening", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.16: FC-3310, OEM 100593, after-1992 note", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Maax Spas", "model": "C-8475 cartridge (OEM 100594)", "series": "Maax Spas of AZ", "oem_part_numbers": "100594", "oem": "100594", "equivalents": { "unicel": "C-8475", "pleatco": "PCS75N", "filbur": "FC-3320" }, "dimensions": { "diameter_in": 8, "length_in": 13, "diameter_text": "8\"", "length_text": "13\"", "top_fitting": "2-1/16\" / open", "bottom_fitting": "2\" male slip fitting", "square_feet": 75 }, "status": "verified", "not_in_sources": "No model name. Opening 2-1/16\" versus 2-1/8\". The year note and 3301-2262 stay on the Coleman row.", "notes": "Maax of AZ lists OEM 100594 as C-8475, 75 sq ft, 8\" x 13\", 2\" male slip, with no model name and without Coleman's after-1992 note or the 3301-2262 twin. The spec table gives a 2-1/16\" opening and 197 pleats. Pleatco PCS75N prints 2-1/8\". This is the longer slip cartridge, not the 9\" OEM 100593.", "row_last_changed": "2026-11-09", "model_page_url": "https://myspafilter.com/maax-spas/c-8475/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Maax Spas of AZ PDF p.44: 100594 = C-8475, 75 sq ft, 8\" x 13\", 2\" male slip, no model. Spec table PDF p.20: 2-1/16\" open, 197 pleats, 75 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.35: PCS75N lists OEM 100594 and 3301-2262", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Coleman Spas section PDF p.17: FC-3320, OEM 100594, C-8475, 75 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Waterway Plastics", "model": "6CH-940 cartridge (OEM 817-0050)", "series": "Front access skim filter", "oem_part_numbers": "817-0050", "oem": "817-0050", "equivalents": { "unicel": "6CH-940", "pleatco": "PWW50P3", "filbur": "FC-0359" }, "dimensions": { "diameter_in": 6, "length_in": 8.25, "diameter_text": "6\"", "length_text": "8-1/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/2\" SAE", "square_feet": 45 }, "status": "verified", "not_in_sources": "Area 50 (Waterway table and Unicel Waterway line) vs 45 (Unicel spec table and Unicel product list) vs 40 (Filbur sq ft column). Length 8-1/4\" vs Pleatco 7-5/8\".", "notes": "Front-access cartridge. Waterway's Service Logic table (fetched 2026-11-09) calls 817-0050 a 50 sq ft, 6\" x 8-1/4\" F/A skimmer cartridge. Unicel's Waterway list prints the same 50 sq ft, and a second line at 100 sq ft with the note that two cartridges are used side by side. The spec table and Unicel's own product list print 6CH-940 at 45 sq ft, 225 pleats. The 45 stored here is the spec-table figure. Pleatco PWW50P3 is 6\" x 7-5/8\", 50 sq ft, and says two are required. Filbur FC-0359's sq ft column is 40.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/waterway-plastics/6ch-940/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Waterway list PDF p.64: 817-0050 = 6CH-940, 6\" x 8-1/4\", 50 sq ft, and a second line at 100 sq ft with two cartridges side by side. Spec table PDF p.12: 45 sq ft, 225 pleats, 1-1/2\" SAE. Product list PDF p.61: 45 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Waterway Plastics Service Logic cartridge table", "where": "Fetched 2026-11-09: 817-0050, 50SF, 6\" x 8-1/4\", F/A skimmer", "url": "https://waterwayplastics.com/product/skimmer-and-skim-filter-options/" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.33: PWW50P3, 6\" x 7-5/8\", 50 sq ft, OEM 817-0050. Cross-reference PDF p.47: 6CH-940 = PWW50P3.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Waterway Plastics section PDF p.28: FC-0359, OEM 817-0050, 6CH-940, sq ft column 40", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Waterway Plastics", "model": "6CH-941 cartridge (OEM 817-0011)", "series": "Front access, stacked upper", "oem_part_numbers": "817-0011", "oem": "817-0011", "equivalents": { "unicel": "6CH-941", "pleatco": null, "filbur": "FC-0360" }, "dimensions": { "diameter_in": 6, "length_in": 8.25, "diameter_text": "6\"", "length_text": "8-1/4\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-3/4\" male slip", "square_feet": 45 }, "status": "verified", "not_in_sources": "Per cartridge: 50 (Waterway) vs 45 (Unicel spec) vs 40 (Filbur description). Filbur's Waterway column prints 80. Pleatco rates the pair, not this cartridge alone, at 100 sq ft.", "notes": "Upper half of the stacked front-access pair. Unicel says 6CH-941 must be used with 6CH-942. Waterway's table calls 817-0011 a 50 sq ft upper cartridge. The spec table prints 45 sq ft and 225 pleats, which is the figure stored here. The bottom is a 1-3/4\" male slip, not the 1-1/2\" SAE of 817-0050. Pleatco's live number is the pair, PWW100P3-SET, 6\" x 16-1/2\" and 100 sq ft, so it is not stored as the equivalent of this one cartridge. Filbur's description says 40 sq ft and the Waterway sq ft column prints 80.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/waterway-plastics/6ch-941/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Waterway list PDF p.64: 817-0011 = 6CH-941, stacked with 817-0012; the 100 and 200 lines are housing totals. Spec table PDF p.12: 45 sq ft, 225 pleats, 1-3/4\" male slip, must be used with 6CH-942.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Waterway Plastics Service Logic cartridge table", "where": "Fetched 2026-11-09: 817-0011, 50 sq ft upper cartridge (extension)", "url": "https://waterwayplastics.com/product/skimmer-and-skim-filter-options/" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.33 and cross-reference PDF p.47: the set PWW100P3-SET covers 817-0011 and 817-0012", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Waterway section PDF p.28: FC-0360, OEM 817-0011, 6CH-941", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Waterway Plastics", "model": "6CH-942 cartridge (OEM 817-0012)", "series": "Front access, stacked lower", "oem_part_numbers": "817-0012", "oem": "817-0012", "equivalents": { "unicel": "6CH-942", "pleatco": null, "filbur": "FC-0361" }, "dimensions": { "diameter_in": 6, "length_in": 8.25, "diameter_text": "6\"", "length_text": "8-1/4\"", "top_fitting": "1-3/4\" open", "bottom_fitting": "1-1/2\" SAE", "square_feet": 45 }, "status": "verified", "not_in_sources": "Same area split as 817-0011: 50, 45, or 40 per cartridge, and 80 in Filbur's Waterway column. The Pleatco set is 100 sq ft for both cartridges together.", "notes": "Lower half of the stacked front-access pair. Top is 1-3/4\" open so the upper cartridge's slip can enter it. Bottom is 1-1/2\" SAE. Unicel says it must be used with 6CH-941. Waterway's table calls 817-0012 a 50 sq ft lower cartridge. The spec table prints 45 sq ft, stored here. Filbur's description says 40 and the Waterway column prints 80. Pleatco's PWW100P3-SET is the pair, not this cartridge alone.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/waterway-plastics/6ch-942/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Waterway list PDF p.64: 817-0012 = 6CH-942, 1-1/2\" SAE, stacked with 817-0011. Spec table PDF p.12: 45 sq ft, 1-3/4\" open top, must be used with 6CH-941.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Waterway Plastics Service Logic cartridge table", "where": "Fetched 2026-11-09: 817-0012, 50 sq ft lower cartridge (extension)", "url": "https://waterwayplastics.com/product/skimmer-and-skim-filter-options/" }, { "source": "Pleatco 2023 Catalog", "where": "PWW100P3-SET spec, PDF p.33, includes OEM 817-0012", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Waterway section PDF p.28: FC-0361, OEM 817-0012, 6CH-942", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Waterway Plastics", "model": "4CH-926 cartridge (OEM 817-4025)", "series": "Teleweir", "oem_part_numbers": "817-4025", "oem": "817-4025", "equivalents": { "unicel": "4CH-926", "pleatco": "PWW25L", "filbur": "FC-0168" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.5, "diameter_text": "4-15/16\"", "length_text": "13-1/2\"", "top_fitting": "v-groove handle", "bottom_fitting": "2\" female SAE", "square_feet": 25 }, "status": "verified", "not_in_sources": "Length 13-1/2\" (Unicel, Waterway) vs 13-3/16\" (Pleatco) vs 13-1/16\" (Filbur). Female thread 2\" (Unicel) vs 1-1/2\" (Pleatco and Filbur). Pleatco's spec line does not print OEM 817-4025.", "notes": "Teleweir 25. Unicel and Waterway's table agree: 4-15/16\" x 13-1/2\", 25 sq ft, SAE thread. Unicel's spec table says 2\" female SAE, 105 pleats, for a 1-1/2\" male SAE standpipe (the standpipe note is printed on the 4CH-935 and 4CH-949 spec lines). Pleatco PWW25L is 5\" x 13-3/16\", 1-1/2\" female SAE, 25 sq ft, and that spec line does not print 817-4025. The cross-reference does: 4CH-926 = PWW25L. Filbur FC-0168 is 13-1/16\" long and 1-1/2\" female SAE. Same length as 817-4050, half the area.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/waterway-plastics/4ch-926/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Waterway list PDF p.64: 817-4025 = 4CH-926, Teleweir, 4-15/16\" x 13-1/2\", 25 sq ft, 2\" female SAE. Spec table PDF p.9: 105 pleats.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Waterway Plastics Service Logic cartridge table", "where": "Fetched 2026-11-09: 817-4025, 25 sq ft, 4-15/16\" x 13-1/2\", SAE thread", "url": "https://waterwayplastics.com/product/skimmer-and-skim-filter-options/" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.32: PWW25L. Cross-reference PDF p.47: 4CH-926 = PWW25L.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Dimensional listing: FC-0168, 4CH-926, PWW25L, 13-1/16\" long, 25 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Waterway Plastics", "model": "4CH-935 cartridge (OEM 817-4035)", "series": "Teleweir", "oem_part_numbers": "817-4035", "oem": "817-4035", "equivalents": { "unicel": "4CH-935", "pleatco": "PWW35L", "filbur": "FC-0170" }, "dimensions": { "diameter_in": 4.9375, "length_in": 9.25, "diameter_text": "4-15/16\"", "length_text": "9-1/4\"", "top_fitting": "v-groove handle", "bottom_fitting": "2\" female SAE", "square_feet": 35 }, "status": "verified", "not_in_sources": "Length 9-1/4\" (Unicel, Waterway, Filbur) vs 8-1/2\" (Pleatco). Area 35 vs Filbur's 30. Filbur prints no Unicel number on the 817-4035 row. Thread 2\" female SAE (Unicel) vs 1-1/2\" female SAE (Pleatco).", "notes": "Short Teleweir. Unicel and Waterway's table: 4-15/16\" x 9-1/4\", 35 sq ft, 2\" female SAE, 219 pleats, for a 1-1/2\" male SAE standpipe. Pleatco PWW35L is 5\" x 8-1/2\", 35 sq ft, OEM 817-4035, 1-1/2\" female SAE. Filbur's Waterway row FC-0170 prints 817-4035 at 4-15/16\" x 9-1/4\" and 30 sq ft, with Unicel N/A. Nordic's chart uses this Waterway number as CARTRIDGE-T35. The 35 stored here is Unicel's and Waterway's figure.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/waterway-plastics/4ch-935/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Waterway list PDF p.64: 817-4035 = 4CH-935, 4-15/16\" x 9-1/4\", 35 sq ft. Spec table PDF p.8: 219 pleats, 2\" female SAE, standpipe note.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Waterway Plastics Service Logic cartridge table", "where": "Fetched 2026-11-09: 817-4035, 35 sq ft, 4-15/16\" x 9-1/4\", SAE thread", "url": "https://waterwayplastics.com/product/skimmer-and-skim-filter-options/" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.32: PWW35L, OEM 817-4035, 5\" x 8-1/2\", 35 sq ft. Cross-reference PDF p.47: 4CH-935 = PWW35L.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Waterway section PDF p.28: FC-0170, OEM 817-4035, 30 sq ft, Unicel N/A", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Waterway Plastics", "model": "4CH-949 cartridge (OEM 817-4050)", "series": "Teleweir", "oem_part_numbers": "817-4050", "oem": "817-4050", "equivalents": { "unicel": "4CH-949", "pleatco": "PWW50L", "filbur": "FC-0172" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.5, "diameter_text": "4-15/16\"", "length_text": "13-1/2\"", "top_fitting": "v-groove handle", "bottom_fitting": "2\" female SAE", "square_feet": 50 }, "status": "verified", "not_in_sources": "Outside diameter 4-15/16\" vs Pleatco 5\". Length 13-1/2\" vs Pleatco 13-3/16\". Female thread 2\" (Unicel, Filbur) vs 1-1/2\" (Pleatco). Filbur's 4CH-949 row does not print 817-4050.", "notes": "Teleweir 50. Same 13-1/2\" length as 817-4025. Unicel and Waterway's table: 4-15/16\" x 13-1/2\", 50 sq ft, 2\" female SAE, 210 pleats, for a 1-1/2\" male SAE standpipe. Pleatco PWW50L is 5\" x 13-3/16\", 1-1/2\" female SAE, 50 sq ft, OEM 817-4050. Filbur FC-0172 matches Unicel's length and 2\" female SAE and 50 sq ft, in the Rising Dragon section, and that row does not print 817-4050.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/waterway-plastics/4ch-949/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Waterway list PDF p.64: 817-4050 = 4CH-949, Teleweir, 4-15/16\" x 13-1/2\", 50 sq ft. Spec table PDF p.9: 210 pleats, 2\" female SAE, standpipe note.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Waterway Plastics Service Logic cartridge table", "where": "Fetched 2026-11-09: 817-4050, 50 sq ft, 4-15/16\" x 13-1/2\", SAE thread", "url": "https://waterwayplastics.com/product/skimmer-and-skim-filter-options/" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.32: PWW50L, OEM 817-4050. Cross-reference PDF p.47: 4CH-949 = PWW50L.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "FC-0172 in the Rising Dragon section: 4CH-949, 4-15/16\" x 13-1/2\", 2\" female SAE, 50 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Waterway Plastics", "model": "C-4310 cartridge (OEM 817-0010)", "series": "Skim filter 10", "oem_part_numbers": "817-0010", "oem": "817-0010", "equivalents": { "unicel": "C-4310", "pleatco": "PWW10", "filbur": "FC-3077" }, "dimensions": { "diameter_in": 4.25, "length_in": 4, "diameter_text": "4-1/4\"", "length_text": "4\"", "top_fitting": "2-1/16\" open", "bottom_fitting": "2-1/16\" open", "square_feet": 10 }, "status": "verified", "not_in_sources": "Top opening 2-1/16\" (Unicel, Pleatco) vs 1-15/16\" (Filbur).", "notes": "10 sq ft skim filter, open both ends. Unicel, Pleatco, and Waterway's table agree on 10 sq ft and on 4-1/4\" x 4\". Unicel and Pleatco print 2-1/16\" openings and 216 pleats in Unicel's spec table. Filbur FC-3077 prints the top opening as 1-15/16\". Pleatco also lists PWW10PAIR at 20 sq ft for two of this cartridge. That pair is not a different body.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/waterway-plastics/c-4310/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Waterway list PDF p.64: 817-0010 = C-4310, 4-1/4\" x 4\", 10 sq ft. Spec table PDF p.6: open 2-1/16\", 216 pleats.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Waterway Plastics Service Logic cartridge table", "where": "Fetched 2026-11-09: 817-0010, 10 sq ft skim filter", "url": "https://waterwayplastics.com/product/skimmer-and-skim-filter-options/" }, { "source": "Pleatco 2023 Catalog", "where": "PWW10 spec: 4-1/4\" x 4\", 2-1/16\" open, 10 sq ft, OEM 817-0010. Cross-reference PDF p.47: C-4310 = PWW10.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Waterway section PDF p.28: FC-3077, OEM 817-0010, C-4310, 10 sq ft, top opening 1-15/16\"", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Waterway Plastics", "model": "C-4326 cartridge (OEM 817-2500)", "series": "Top load 25", "oem_part_numbers": "817-2500", "oem": "817-2500", "equivalents": { "unicel": "C-4326", "pleatco": "PRB25-IN", "filbur": "FC-2375" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" open", "bottom_fitting": "2-1/8\" open", "square_feet": 25 }, "status": "verified", "not_in_sources": "Outside diameter 4-15/16\" vs Pleatco 5\". Filbur FC-2910 length 13-1/4\" in the size table and 12-1/4\" in the Waterway section, against 13-5/16\" on FC-2375, Unicel, and Pleatco.", "notes": "25 sq ft open top-load. Unicel: 4-15/16\" x 13-5/16\", open 2-1/8\", 106 pleats, 25 sq ft. Pleatco PRB25-IN lists OEM 817-2500 at 5\" outside diameter and the same length. Filbur prints this OEM on two rows: FC-2375 at 13-5/16\" (PRB25-IN, C-4326) and FC-2910, which the size table lengths at 13-1/4\" and the Waterway section lengths at 12-1/4\", with no Pleatco number. The size stored here is Unicel's. The 50 sq ft cartridge of the same length is 817-5000.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/waterway-plastics/c-4326/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Waterway list PDF p.64: 817-2500 = C-4326, 4-15/16\" x 13-5/16\", 25 sq ft. Spec table PDF p.9: open 2-1/8\", 106 pleats.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Waterway Plastics Service Logic cartridge table", "where": "Fetched 2026-11-09: 817-2500, 25 sq ft, in-line top-load", "url": "https://waterwayplastics.com/product/skimmer-and-skim-filter-options/" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.32: PRB25-IN includes OEM 817-2500, 5\" x 13-5/16\", 25 sq ft", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Waterway section PDF p.28: FC-2375 and FC-2910 both list OEM 817-2500. Size table lengths FC-2910 at 13-1/4\".", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Waterway Plastics", "model": "C-4950 cartridge (OEM 817-5000)", "series": "Top load 50", "oem_part_numbers": "817-5000", "oem": "817-5000", "equivalents": { "unicel": "C-4950", "pleatco": "PRB50-IN", "filbur": "FC-2390" }, "dimensions": { "diameter_in": 4.9375, "length_in": 13.3125, "diameter_text": "4-15/16\"", "length_text": "13-5/16\"", "top_fitting": "2-1/8\" open", "bottom_fitting": "2-1/8\" open", "square_feet": 50 }, "status": "verified", "not_in_sources": "Outside diameter 4-15/16\" (Unicel, Filbur) vs 5\" (Pleatco).", "notes": "50 sq ft open top-load. Same outside size as 817-2500. Unicel's spec note calls C-4950 an upgrade of the 25 sq ft C-4326: 212 pleats against 106, same 4-15/16\" x 13-5/16\" body. Pleatco PRB50-IN lists OEM 817-5000 at 5\" outside diameter. Filbur FC-2390 agrees with Unicel's size and 50 sq ft. Waterway's table calls 817-5000 a 50 sq ft in-line top-load cartridge.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/waterway-plastics/c-4950/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Waterway list PDF p.64: 817-5000 = C-4950, 4-15/16\" x 13-5/16\", 50 sq ft. Spec table PDF p.9: 212 pleats, and the note that C-4950 is an upgrade of C-4326.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Waterway Plastics Service Logic cartridge table", "where": "Fetched 2026-11-09: 817-5000, 50 sq ft, in-line top-load", "url": "https://waterwayplastics.com/product/skimmer-and-skim-filter-options/" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.32: PRB50-IN includes OEM 817-5000, 5\" x 13-5/16\", 50 sq ft", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Waterway section PDF p.28: FC-2390, OEM 817-5000, C-4950, 50 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Waterway Plastics", "model": "C-4970 cartridge (OEM 817-7500)", "series": "Top load 75, discontinued by Unicel", "oem_part_numbers": "817-7500", "oem": "817-7500", "equivalents": { "unicel": "C-4970", "pleatco": null, "filbur": "FC-2930" }, "dimensions": { "diameter_in": 4.9375, "length_in": 23.625, "diameter_text": "4-15/16\"", "length_text": "23-5/8\"", "top_fitting": "2-1/8\" open", "bottom_fitting": "2-1/8\" open", "square_feet": 75 }, "status": "verified", "not_in_sources": "Unicel says to stop using this number. Waterway's table and Filbur still list it at 75 sq ft. The replacement Unicel names is a different area.", "notes": "75 sq ft top-load. Unicel's Waterway line prints 817-7500 = C-4970 at 75 sq ft and says C-4970 is discontinued: use C-4995. C-4995 is 817-1000, which Unicel rates at 95 sq ft, so the named replacement is not a 75. Waterway's current table still lists 817-7500 at 75 sq ft. Filbur FC-2930 still prints C-4970, PCAL75, and 817-7500 at 75 sq ft. Pleatco's deactivated list sends PCAL75 to PCAL100 and does not print 817-7500. PCAL100 is not stored here; it is the equivalent on the 817-1000 row.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/waterway-plastics/c-4970/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Waterway list PDF p.64: 817-7500 = C-4970, 75 sq ft, 4-15/16\" x 23-5/8\", discontinued, use C-4995. Spec table PDF p.9: 178 pleats, same discontinued note.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Waterway Plastics Service Logic cartridge table", "where": "Fetched 2026-11-09: 817-7500 still listed, 75 sq ft, in-line top-load", "url": "https://waterwayplastics.com/product/skimmer-and-skim-filter-options/" }, { "source": "Pleatco 2023 Catalog", "where": "Deactivated list PDF p.21: PCAL75 replacement PCAL100", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Waterway section PDF p.28: FC-2930, OEM 817-7500, C-4970, 75 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Waterway Plastics", "model": "C-4995 cartridge (OEM 817-1000)", "series": "Top load, the C-4970 replacement", "oem_part_numbers": "817-1000", "oem": "817-1000", "equivalents": { "unicel": "C-4995", "pleatco": "PCAL100", "filbur": "FC-2940" }, "dimensions": { "diameter_in": 4.9375, "length_in": 23.625, "diameter_text": "4-15/16\"", "length_text": "23-5/8\"", "top_fitting": "2-1/8\" open", "bottom_fitting": "2-1/8\" open", "square_feet": 95 }, "status": "verified", "not_in_sources": "Area 95 (Unicel spec and Unicel Waterway line) vs 100 (Waterway's table, Pleatco, Filbur Waterway section). A second Filbur row prints 95. Outside diameter 4-15/16\" vs Pleatco 5\".", "notes": "The cartridge Unicel names in place of discontinued C-4970. Unicel's spec table and Waterway OEM line: 4-15/16\" x 23-5/8\", open 2-1/8\", 222 pleats, 95 sq ft. That 95 is what is stored. Waterway's own table calls 817-1000 a 100 sq ft in-line cartridge. Pleatco PCAL100 is 5\" x 23-5/8\", 100 sq ft, OEM 817-1000. Filbur's Waterway section prints FC-2940 at 100 sq ft, and another FC-2940 row prints 95. Same length as the 75 sq ft cartridge it replaces.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/waterway-plastics/c-4995/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Waterway list PDF p.64: 817-1000 = C-4995, 95 sq ft, and the C-4970 note that says to use it. Spec table PDF p.9: 222 pleats, 95 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Waterway Plastics Service Logic cartridge table", "where": "Fetched 2026-11-09: 817-1000, 100 sq ft, in-line top mount", "url": "https://waterwayplastics.com/product/skimmer-and-skim-filter-options/" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.32: PCAL100, 100 sq ft, OEM 817-1000. Cross-reference PDF p.47: C-4995 = PCAL100.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Waterway section PDF p.28: FC-2940 at 100 sq ft. Another FC-2940 row prints 95 sq ft.", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Waterway Plastics", "model": "C-6375 cartridge (OEM 817-0018)", "series": "Dyna-Flo XL", "oem_part_numbers": "817-0018", "oem": "817-0018", "equivalents": { "unicel": "C-6375", "pleatco": null, "filbur": "FC-3754" }, "dimensions": { "diameter_in": 6.5625, "length_in": 13.3125, "diameter_text": "6-9/16\"", "length_text": "13-5/16\"", "top_fitting": "2-3/8\" open", "bottom_fitting": "2-3/8\" open", "square_feet": 75 }, "status": "verified", "not_in_sources": "No Pleatco equivalent in the 2023 cross-reference.", "notes": "Dyna-Flo XL, 75 sq ft. Waterway's table writes 2-3/8\" x 6-9/16\" x 13-5/16\", which is the open end, the outside diameter, and the length. Unicel's spec table prints the same three numbers, 224 pleats, 75 sq ft. Filbur FC-3754 agrees and names 817-0018. The 2023 Pleatco cross-reference has no C-6375 line. The longer Dyna-Flo, 817-0019 / C-6310, is a different cartridge and is not this row.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/waterway-plastics/c-6375/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Waterway list PDF p.64: 817-0018 = C-6375, Dyna-Flo XL, 6-9/16\" x 13-5/16\", 75 sq ft. Spec table PDF p.13: open 2-3/8\", 224 pleats.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Waterway Plastics Service Logic cartridge table", "where": "Fetched 2026-11-09: 817-0018, 75 sq ft Dyna-Flo XL, 2-3/8\" x 6-9/16\" x 13-5/16\"", "url": "https://waterwayplastics.com/product/skimmer-and-skim-filter-options/" }, { "source": "Filbur Catalog & Reference Guide", "where": "Waterway section PDF p.28: FC-3754, OEM 817-0018, C-6375, 75 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Saratoga Spas", "model": "4CH-20 cartridge (OEM 20241-238)", "series": "Saratoga Spas", "oem_part_numbers": "20241-238", "oem": "20241-238", "equivalents": { "unicel": "4CH-20", "pleatco": "PSG25P4", "filbur": "FC-0125" }, "dimensions": { "diameter_in": 4.625, "length_in": 6.75, "diameter_text": "4-5/8\"", "length_text": "6-3/4\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2\" MPT", "square_feet": 20 }, "status": "verified", "not_in_sources": "Area 20 (Unicel spec, price index, Saratoga line) vs 25 (Unicel Vita line, Pleatco, Filbur Vita section, Filbur size-table column) vs 15 (Filbur Saratoga section). Length 6-3/4\" vs Pleatco 6-1/2\". Outside diameter 4-5/8\" vs Pleatco 4-3/4\".", "notes": "Short Saratoga top-load, 1-1/2\" MPT. Unicel's spec table, price index, and Saratoga line all say 4-5/8\" x 6-3/4\", 204 pleats, 20 sq ft, for OEM 20241-238. That 20 is what is stored. Unicel's Vita line prints the same 4CH-20 as PVT 25 at 25 sq ft. Pleatco PSG25P4 is 4-3/4\" x 6-1/2\", 25 sq ft, OEM 20241-238. The 2023 Unicel cross-reference has no 4CH-20 line. Filbur's Saratoga section prints FC-0125 at 15 sq ft and names the Pleatco cell PHC25, which Pleatco deactivates with replacement N/A. Filbur's size-table description says 20 sq ft and its column says 25. Filbur's Vita section prints 25 sq ft for OEM PVT-25. The 1-1/4\" SAE cartridge of this length is 4CH-920, not this one.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/saratoga-spas/4ch-20/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Saratoga list PDF p.55: 20241-238 = 4CH-20, 4-5/8\" x 6-3/4\", 20 sq ft, 1-1/2\" MPT. Spec table PDF p.7: 204 pleats, 20 sq ft. Price index PDF p.88: 20 sq ft. Vita list PDF p.63: PVT 25 = 4CH-20 at 25 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.31: PSG25P4, OEM 20241-238, 4-3/4\" x 6-1/2\", 25 sq ft. Deactivated list: PHC25 replacement N/A.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Saratoga section PDF p.25: FC-0125 at 15 sq ft. Size table column 25. Vita section PDF p.28: 25 sq ft for PVT-25.", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Saratoga Spas", "model": "4CH-920 cartridge (1-1/4\" SAE)", "series": "Saratoga Spas", "oem_part_numbers": "", "oem": "", "equivalents": { "unicel": "4CH-920", "pleatco": null, "filbur": "FC-0124" }, "dimensions": { "diameter_in": 4.625, "length_in": 6.75, "diameter_text": "4-5/8\"", "length_text": "6-3/4\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/4\" SAE", "square_feet": 20 }, "status": "verified", "not_in_sources": "No OEM number in Unicel or Filbur. Area 20 (Unicel) vs 15 (Filbur). No Pleatco cross-reference line. Filbur's PSG13.5 cell is a different length in Pleatco's own spec.", "notes": "Same 4-5/8\" x 6-3/4\" body as 4CH-20, with a 1-1/4\" SAE bottom instead of 1-1/2\" MPT. Unicel's Saratoga line prints no OEM number. Spec table and price index: 204 pleats, 20 sq ft. Filbur FC-0124 prints 15 sq ft and the Pleatco cell PSG13.5. Pleatco's PSG13.5P4 is 4-3/4\" x 5-15/16\" and 14 sq ft, OEM 303575, which is not this length and is not on Unicel's Saratoga list, so it is not stored as the equivalent. The 2023 cross-reference has no 4CH-920 line. Filbur's footnote says to remove Saratoga's adapter and match the replacement to the fitting that remains.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/saratoga-spas/4ch-920/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Saratoga list PDF p.55: 4CH-920, 4-5/8\" x 6-3/4\", 1-1/4\" SAE, 20 sq ft, no OEM. Spec table PDF p.7: 204 pleats. Price index PDF p.88: 20 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Saratoga section PDF p.25: FC-0124, 4CH-920, 15 sq ft, and the adapter footnote", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Cross-reference PDF p.47 has no 4CH-920 line. Spec table PDF p.31: PSG13.5P4 is a shorter cartridge, OEM 303575.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Saratoga Spas", "model": "4CH-21 cartridge (OEM 20245-238)", "series": "Saratoga Spas", "oem_part_numbers": "20245-238", "oem": "20245-238", "equivalents": { "unicel": "4CH-21", "pleatco": "PTL18P4", "filbur": "FC-0121" }, "dimensions": { "diameter_in": 4.625, "length_in": 8, "diameter_text": "4-5/8\"", "length_text": "8\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2\" MPT", "square_feet": 19 }, "status": "verified", "not_in_sources": "Area 19 (Unicel, Filbur) vs 18 (Pleatco). Length agrees at 8\".", "notes": "1-1/2\" MPT, 4-5/8\" x 8\". Unicel's spec table: 158 pleats, 19 sq ft. The Saratoga line names OEM 20245-238. Pleatco PTL18P4 is the same length and 18 sq ft, and the spec line also names Vita PVT-25N. Filbur FC-0121 agrees with Unicel's 19 sq ft. The 19 stored here is Unicel's and Filbur's figure.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/saratoga-spas/4ch-21/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Saratoga list PDF p.55: 20245-238 = 4CH-21, 4-5/8\" x 8\", 19 sq ft. Spec table PDF p.7: 158 pleats, 19 sq ft. Price index PDF p.88: 19 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.31: PTL18P4, OEM 20245-238, 18 sq ft. Cross-reference PDF p.47: 4CH-21 = PTL18P4.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Saratoga section PDF p.25: FC-0121, 4CH-21, 19 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Saratoga Spas", "model": "4CH-24 cartridge (OEM 20254-238)", "series": "Saratoga Spas", "oem_part_numbers": "20254-238", "oem": "20254-238", "equivalents": { "unicel": "4CH-24", "pleatco": "PGS25P4", "filbur": "FC-0131" }, "dimensions": { "diameter_in": 4.625, "length_in": 9.75, "diameter_text": "4-5/8\"", "length_text": "9-3/4\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2\" MPT", "square_feet": 25 }, "status": "verified", "not_in_sources": null, "notes": "1-1/2\" MPT, 4-5/8\" x 9-3/4\", 25 sq ft. Unicel's spec table gives 173 pleats. Pleatco PGS25P4 and Filbur FC-0131 print the same size and 25 sq ft for OEM 20254-238. This is the Saratoga cartridge the three catalogs agree on.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/saratoga-spas/4ch-24/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Saratoga list PDF p.55: 20254-238 = 4CH-24, 4-5/8\" x 9-3/4\", 25 sq ft. Spec table PDF p.7: 173 pleats. Price index PDF p.88: 25 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Spec table PDF p.31: PGS25P4, OEM 20254-238, 25 sq ft. Cross-reference PDF p.47: 4CH-24 = PGS25P4.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Saratoga section PDF p.25: FC-0131, 4CH-24, 25 sq ft", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" } ] }, { "brand": "Saratoga Spas", "model": "4CH-30 cartridge (OEM 74407-98)", "series": "Saratoga Spas", "oem_part_numbers": "74407-98", "oem": "74407-98", "equivalents": { "unicel": "4CH-30", "pleatco": null, "filbur": "FC-0141" }, "dimensions": { "diameter_in": 4.625, "length_in": 11.875, "diameter_text": "4-5/8\"", "length_text": "11-7/8\"", "top_fitting": "molded cone handle", "bottom_fitting": "1-1/2\" MPT", "square_feet": 30 }, "status": "verified", "not_in_sources": "Area 30 (Unicel) vs 27 (Filbur Saratoga section). No live Pleatco number that prints this OEM. The deactivated-list replacement PSG27.5P4 is 11-3/8\" and 28 sq ft and does not name 74407-98.", "notes": "Longest of the Saratoga 1-1/2\" MPT cartridges. Unicel: 4-5/8\" x 11-7/8\", 158 pleats, 4 oz media, 30 sq ft, OEM 74407-98. Filbur FC-0141 is the same length and prints 27 sq ft. The Pleatco cell on that Filbur row, PTL25P-4, is on Pleatco's deactivated list and is sent to PSG27.5P4. PSG27.5P4's own spec is 4-3/4\" x 11-3/8\", 28 sq ft, 'Saratoga Spas Circulation Pump,' and it does not print 74407-98 or 4CH-30, so it is not stored as the equivalent. The 2023 cross-reference has no 4CH-30 line. The 30 stored here is Unicel's.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/saratoga-spas/4ch-30/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Saratoga list PDF p.55: 74407-98 = 4CH-30, 4-5/8\" x 11-7/8\", 30 sq ft, 1-1/2\" MPT. Spec table PDF p.7: 158 pleats, 4 oz, 30 sq ft. Price index PDF p.88: 30 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Saratoga section PDF p.25: FC-0141, 4CH-30, 27 sq ft, cell PTL25P-4", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Deactivated list: PTL25P4 replacement PSG27.5P4. Spec table PDF p.31: PSG27.5P4 does not name 74407-98. Cross-reference PDF p.47 has no 4CH-30 line.", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] }, { "brand": "Saratoga Spas", "model": "4CH-950 cartridge (OEM 74408-99)", "series": "Saratoga Spas", "oem_part_numbers": "74408-99", "oem": "74408-99", "equivalents": { "unicel": "4CH-950", "pleatco": null, "filbur": "FC-0173" }, "dimensions": { "diameter_in": 4.625, "length_in": 12, "diameter_text": "4-5/8\"", "length_text": "12\"", "top_fitting": "semi-circular handle", "bottom_fitting": "1-1/4\" SAE", "square_feet": 25 }, "status": "verified", "not_in_sources": "Length 12\" (Unicel) vs 11-7/8\" (Filbur). Filbur Saratoga section 27 sq ft vs Unicel and Filbur's size table at 25. Pleatco cell deactivated, replacement N/A.", "notes": "1-1/4\" SAE, not MPT. Unicel's Saratoga line: OEM 74408-99, 4-5/8\" x 12\", 25 sq ft. Spec table: 139 pleats, and the description also names Dimension One. Filbur FC-0173 is 11-7/8\" long. The Saratoga section's sq ft column is 27; the size table says 25 sq ft. The Pleatco cell PDO-UF25P2 is deactivated with replacement N/A, so no Pleatco number is stored. Dimension One's OEM for this Unicel number is 1561-04. The 25 and 12\" stored here are Unicel's.", "row_last_changed": "2026-11-10", "model_page_url": "https://myspafilter.com/saratoga-spas/4ch-950/", "fitment": [], "sources": [ { "source": "Unicel 2026 Replacement Guide", "where": "Saratoga list PDF p.55: 74408-99 = 4CH-950, 4-5/8\" x 12\", 25 sq ft, 1-1/4\" SAE. Spec table PDF p.8: 139 pleats, 25 sq ft. Price index PDF p.88: 25 sq ft.", "url": "https://www.unicelfilters.com/wp-content/uploads/2026/02/2026-Unicel-Replacement-Guide.pdf" }, { "source": "Filbur Catalog & Reference Guide", "where": "Saratoga section PDF p.25: FC-0173 at 27 sq ft and 11-7/8\". Size table: 25 sq ft.", "url": "https://filbur.com/wp-content/uploads/2024/11/Filbur-Catalog-Reference-Guide.pdf" }, { "source": "Pleatco 2023 Catalog", "where": "Deactivated list: PDO-UF25 replacement N/A", "url": "https://www.pentair.com/content/dam/extranet/nam/pentair-pool/residential/catalogs/pleatco/Pleatco-Catalog-2023-PRINT-Master.pdf" } ] } ] }