Intex OEM 29001E spa filter (C-4317)

Intex PureSpa Type S1 (inflatable spa) Unverified: 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.

Intex PureSpa Type S1 (inflatable spa) is the group name on the Intex row C-4317 cartridge (OEM 29001E). Match these numbers: OEM 29001E, 29011E, 29001, 11692; Unicel C-4317; Pleatco PIN4PAIR. 4-1/4" across, 2-15/16" long, top 2-1/16" / open, bottom 2-1/16" / open, 4 sq ft.

Catalog note for 29001E: 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.

C-4317 (OEM 29001E), Pleatco side: matched by OEM 29001E in the Pleatco 2023 spec table (PDF p.31); the Intex part is not in the Pleatco Unicel cross reference.

Hot tubs named for 29001E: Intex PureSpa 28403E, years 2017–2019, 2022–2026, listed by Intex compatible-item list (Intex's list names it as a 2019 set); Intex PureSpa 28405E, years 2017, 2018, listed by Intex compatible-item list (Intex's list names it as a 2019 set); Intex PureSpa 28407E, years 2017–2026, listed by Intex compatible-item list (Intex's list names it as a 2019 set); Intex PureSpa 28409E, years 2017–2019, listed by Intex compatible-item list (Intex's list names it as a 2019 set); Intex PureSpa 28413WL, years 2017, 2018, 2022–2026, listed by Intex compatible-item list; Intex PureSpa 28421E, years 2016, 2024–2026, listed by Intex compatible-item list; Intex PureSpa 28425E, years 2020–2022, listed by Intex compatible-item list; Intex PureSpa 28427E, years 2020–2022, listed by Intex compatible-item list; Intex PureSpa 28429E, years 2020–2022, listed by Intex compatible-item list; Intex PureSpa 28431E, years 2020–2022, listed by Intex compatible-item list; Intex PureSpa 28433EP, no year range printed, listed by Intex compatible-item list; Intex PureSpa 28433WL, no year range printed, listed by Intex compatible-item list; Intex PureSpa 28435E, years 2016, 2024–2026, listed by Intex compatible-item list; Intex PureSpa 28439E, years 2020–2022, listed by Intex compatible-item list; Intex PureSpa 28441E, years 2020–2022, listed by Intex compatible-item list; Intex PureSpa 28453E, years 2017–2019, listed by Intex compatible-item list (Intex's list names it as a 2019 set); Intex PureSpa 28455E, years 2017–2019, listed by Intex compatible-item list; Intex PureSpa 28457E, years 2020–2022, listed by Intex compatible-item list; Intex PureSpa 28457EP, no year range printed, listed by Intex compatible-item list; Intex PureSpa 28461E, years 2020–2022, listed by Intex compatible-item list; Intex PureSpa 28473E, years 2019–2026, listed by Intex compatible-item list; Intex PureSpa 28475E, years 2021, listed by Intex compatible-item list; Intex SimpleSpa 28481E, years 2020–2022, listed by Intex compatible-item list; Intex PureSpa 28491E, years 2017, 2019–2021, 2024–2026, listed by Intex compatible-item list.

C-4317 is easy to confuse on the Intex table. Type S2 cartridge (Intex 29012E) differs by no Unicel number, no Pleatco number, 3-3/8" diameter, 5-1/8" long, top not given, bottom not given, no sq ft printed, OEM 29012E, note says 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..

Filbur does not have a number on this row. Search 29001E or the Intex part you pulled out of the spa.

Left blank on purpose: 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..

Pages checked for 29001E: Intex (manufacturer replacement-part page) on C-4317 (11692, Spa Cartridge (S1): Compatible Item List of 24 PureSpa/SimpleSpa set numbers). Intex (manufacturer product page) on C-4317 (Type S1 Hot Tub Filter Cartridge, SKU 29001E, described as the PureSpa replacement filter). Intex (manufacturer product page) on C-4317 (Type S1 filter cartridge six-pack, SKU 29011E). Unicel 2026 Replacement Guide on C-4317 (OEM cross reference (Intex section), PDF p.40 (printed p.36)). Pleatco 2023 Catalog on C-4317 (spec table PDF p.31 (Intex EZ Set Pure Spa S1, OEM 29001E = PIN4PAIR)). Home Depot listing for Intex 29001E (retailer) on C-4317 (Compatible-models list: PureSpa 28403E, 28407E, 28443E, 28453E, 28421E, 28423E, 28413E (28413E, 28423E and 28443E are not on Intex's own list)). Intex (manufacturer replacement-parts archive) on C-4317 (PureSpa set-number and model-year folders (2016–2026) that list part 11692).

Hot tubs listed for this cartridge

The rest of the Intex model list is the Intex filter by model and year lookup.

Check the cartridge you removed

Measure diameter, length, and both ends, then compare them with the figures above. The steps are in the measuring guide. Why the bottom decides whether it seals: open-end vs threaded filters. Power, the retainer, and not running the spa empty: how to install a cartridge. Brand notes: Intex and Bestway filters. Number formats: how Filbur, Unicel and Pleatco numbers compare.

Other Intex cartridges

• Type S2 cartridge (Intex 29012E), 3-3/8" (86 mm) × 5-1/8" (130 mm)

All 2 Intex spa filters

Every number on this row, on one screen: cross-reference lookup. Published clean and replace intervals for this cartridge, and a buy link for the numbers above: replacement schedule and reorder. The interval comparison by brand: calculator.

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Unverified. This row has not been fully confirmed against a second source. Gaps: 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.. Measure your old cartridge before ordering.

Sources

• Intex (manufacturer replacement-part page): 11692, Spa Cartridge (S1): Compatible Item List of 24 PureSpa/SimpleSpa set numbers (web page)
• Intex (manufacturer product page): Type S1 Hot Tub Filter Cartridge, SKU 29001E, described as the PureSpa replacement filter (web page)
• Intex (manufacturer product page): Type S1 filter cartridge six-pack, SKU 29011E (web page)
• Unicel 2026 Replacement Guide: OEM cross reference (Intex section), PDF p.40 (printed p.36) (PDF)
• Pleatco 2023 Catalog: spec table PDF p.31 (Intex EZ Set Pure Spa S1, OEM 29001E = PIN4PAIR) (PDF)
• Home Depot listing for Intex 29001E (retailer): Compatible-models list: PureSpa 28403E, 28407E, 28443E, 28453E, 28421E, 28423E, 28413E (28413E, 28423E and 28443E are not on Intex's own list) (web page)
• Intex (manufacturer replacement-parts archive): PureSpa set-number and model-year folders (2016–2026) that list part 11692 (web page)