Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
FC-2390 spa filter equivalents
Part number FC-2390 appears in 11 cross-reference rows below. Each row lists the OEM, Unicel and Pleatco numbers that the source documents treat as interchangeable, plus the cartridge size so you can confirm against your old filter.
The same numbers, on one page, are in the cross-reference lookup. A schedule for this part number, and the buy link, are on the replacement schedule and reorder page. Published intervals by brand are in the replace and clean calculator.
Caldera C-4950 cartridge (OEM 302005), 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950
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| OEM | 302005 |
|---|---|
| Unicel | C-4950 |
| Pleatco | PRB50-IN |
| Filbur | FC-2390 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Caldera section), PDF p.30 (printed p.26); spec table PDF p.9 (printed p.5) (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (PDF)
- Filbur Catalog & Reference Guide: Unicel-to-Filbur reverse cross reference, printed p.64 (PDF p.33) (PDF)
- Spa Parts Depot (retailer): 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 (web page)
- Spring Dance Hot Tubs (Watkins dealer): 76076: 10" tall, 5-1/4" diameter, 2-1/8" centre hole; Hot Spot Sprint/Dash, Caldera Vacanza Lina/Cima (a different cartridge) (web page)
Not in sources: 302005 is listed only by Unicel; no model-year fitment in sources.
Full details → · All Caldera spa filters · Which fitting you need · How to install it
Jacuzzi C-4950 cartridge (OEM 373045), 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | 373045 |
|---|---|
| Unicel | C-4950 |
| Pleatco | PRB50-IN |
| Filbur | FC-2390 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Jacuzzi section), PDF p.42 (printed p.38); spec table PDF p.9 (printed p.5) (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Jacuzzi Premium Spas, printed p.40 (PDF p.21) (PDF)
Not in sources: no model/model-year fitment in sources.
Full details → · All Jacuzzi spa filters · Which fitting you need · How to install it
Sundance C-4950 cartridge (OEM 6540-471), 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | 6540-471 |
|---|---|
| Unicel | C-4950 |
| Pleatco | PRB50-IN |
| Filbur | FC-2390 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.9 (printed p.5) (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Sundance, printed p.52 (PDF p.27) (PDF)
Not in sources: no model/model-year fitment in sources.
Full details → · All Sundance spa filters · Which fitting you need · How to install it
Bullfrog C-4950 cartridge, 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | |
|---|---|
| Unicel | C-4950 |
| Pleatco | PRB50-IN |
| Filbur | FC-2390 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Bullfrog section), PDF p.30 (printed p.26); spec table PDF p.9 (printed p.5) (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Bullfrog, printed p.29 (PDF p.15) (PDF)
Not in sources: no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry.
Full details → · All Bullfrog spa filters · Which fitting you need · How to install it
Cal Spas C-4950 cartridge, 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | |
|---|---|
| Unicel | C-4950 |
| Pleatco | PRB50-IN |
| Filbur | FC-2390 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Cal Spas section), PDF p.30 (printed p.26); spec table PDF p.9 (printed p.5) (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Cal Spas, printed p.29 (PDF p.15) (PDF)
Not in sources: no model/model-year fitment in sources; Unicel lists no OEM part number for this brand entry.
Full details → · All Cal Spas spa filters · Which fitting you need · How to install it
Arctic Spas C-4950 cartridge, 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | PRT-115LOT |
|---|---|
| Unicel | C-4950 |
| Pleatco | PRB50-IN |
| Filbur | FC-2390 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: 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) (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (C-4950 = PRB50-IN); Filbur prints this as PRB50-/-MIN (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Arctic Spas, printed p.27 (PDF p.14) (PDF)
- Arctic Spas Ontario (dealer): Filter 50 Pleated Drop-In: PRT-115LOT, 50 sq ft, = C-4950 / PRB50-IN / FC-2390, Arctic and most Coyote spas 2008 or earlier (web page)
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.
Full details → · All Arctic Spas spa filters · Which fitting you need · How to install it
Beachcomber C-4950 cartridge (SKU 3005815), 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | 3005815 |
|---|---|
| Unicel | C-4950 |
| Pleatco | PRB50-IN |
| Filbur | FC-2390 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft |
Sources
- Beachcomber Hot Tubs (manufacturer product page): 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 (web page)
- Unicel 2026 Replacement Guide: 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 (PDF)
- Pleatco 2023 Catalog: Unicel-to-Pleatco cross reference, PDF p.47 (C-4950 = PRB50-IN); spec table PDF p.32 (5" OD) (PDF)
- Filbur Catalog & Reference Guide: Beachcomber Spas, PDF p.15: FC-2390 = C-4950, 4-15/16" x 13-5/16", 50 sq ft (PDF)
Not in sources: Pleatco outside diameter 5" vs 4-15/16"; Beachcomber describes a finer strain and prints no micron.
Full details → · All Beachcomber spa filters · Which fitting you need · How to install it
Freedom Spas C-4950 cartridge, 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | |
|---|---|
| Unicel | C-4950 |
| Pleatco | PRB50-IN |
| Filbur | FC-2390 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: 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 (PDF)
- Pleatco 2023 Catalog: Unicel cross-reference PDF p.47: C-4950 = PRB50-IN (PDF)
- Filbur Catalog & Reference Guide: Freedom Spas section PDF p.18 (printed p.35): FC-2390, Rainbow Dynamic 50, same 1993 note (PDF)
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..
Full details → · All Freedom Spas spa filters · Which fitting you need · How to install it
Coleman Spas C-4950 cartridge (OEM 100533), 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | 100533 |
|---|---|
| Unicel | C-4950 |
| Pleatco | PRB50-IN |
| Filbur | FC-2390 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: 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. (PDF)
- Pleatco 2023 Catalog: Spec table PDF p.32: PRB50-IN lists OEM 100533, 5" OD, 50 sq ft (PDF)
- Filbur Catalog & Reference Guide: Coleman Spas section PDF p.16: FC-2390, OEM 100533, PRB50-IN, C-4950, 50 sq ft (PDF)
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..
Full details → · All Coleman Spas spa filters · Which fitting you need · How to install it
Maax Spas C-4950 cartridge (OEM 100533), 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | 100533 |
|---|---|
| Unicel | C-4950 |
| Pleatco | PRB50-IN |
| Filbur | FC-2390 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: 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. (PDF)
- Pleatco 2023 Catalog: Spec table PDF p.32: PRB50-IN includes OEM 100533 (PDF)
- Filbur Catalog & Reference Guide: Coleman Spas section PDF p.16: FC-2390, OEM 100533, C-4950. No separate Maax heading for this OEM. (PDF)
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..
Full details → · All Maax Spas spa filters · Which fitting you need · How to install it
Waterway Plastics C-4950 cartridge (OEM 817-5000), 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft. Unicel C-4950, Pleatco PRB50-IN.
Unicel C-4950 Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
| OEM | 817-5000 |
|---|---|
| Unicel | C-4950 |
| Pleatco | PRB50-IN |
| Filbur | FC-2390 |
| Size | 4-15/16" (125 mm) × 13-5/16" (338 mm), 50 sq ft |
Sources
- Unicel 2026 Replacement Guide: 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. (PDF)
- Waterway Plastics Service Logic cartridge table: Fetched 2026-11-09: 817-5000, 50 sq ft, in-line top-load (web page)
- Pleatco 2023 Catalog: Spec table PDF p.32: PRB50-IN includes OEM 817-5000, 5" x 13-5/16", 50 sq ft (PDF)
- Filbur Catalog & Reference Guide: Waterway section PDF p.28: FC-2390, OEM 817-5000, C-4950, 50 sq ft (PDF)
Not in sources: Outside diameter 4-15/16" (Unicel, Filbur) vs 5" (Pleatco)..
Full details → · All Waterway Plastics spa filters · Which fitting you need · How to install it