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C-4317 spa filter equivalents
Part number C-4317 appears in 1 cross-reference row 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.
Intex C-4317 cartridge (OEM 29001E), 4-1/4" (108 mm) × 2-15/16" (75 mm), 4 sq ft. Unicel C-4317, Pleatco PIN4PAIR.
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| OEM | 29001E |
|---|---|
| Unicel | C-4317 |
| Pleatco | PIN4PAIR |
| Filbur | not listed |
| Size | 4-1/4" (108 mm) × 2-15/16" (75 mm), 4 sq ft |
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)
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