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PWW25L spa filter equivalents
Part number PWW25L 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.
Waterway Plastics 4CH-926 cartridge (OEM 817-4025), 4-15/16" (125 mm) × 13-1/2" (343 mm), 25 sq ft. Unicel 4CH-926, Pleatco PWW25L.
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| OEM | 817-4025 |
|---|---|
| Unicel | 4CH-926 |
| Pleatco | PWW25L |
| Filbur | FC-0168 |
| Size | 4-15/16" (125 mm) × 13-1/2" (343 mm), 25 sq ft |
Sources
- Unicel 2026 Replacement Guide: 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. (PDF)
- Waterway Plastics Service Logic cartridge table: Fetched 2026-11-09: 817-4025, 25 sq ft, 4-15/16" x 13-1/2", SAE thread (web page)
- Pleatco 2023 Catalog: Spec table PDF p.32: PWW25L. Cross-reference PDF p.47: 4CH-926 = PWW25L. (PDF)
- Filbur Catalog & Reference Guide: Dimensional listing: FC-0168, 4CH-926, PWW25L, 13-1/16" long, 25 sq ft (PDF)
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..
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