Pleatco PWW25L = Unicel 4CH-926
25 sq ft hot tub filter, 5" diameter × 13-3/16" long. Top: Handle · Bottom: 1-1/2" FEMALE SAE. Pleatco application: Waterway Teleweir 25.
Interchangeable cartridges
- Unicel 4CH-926 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.9 (Cartridges by series (dimensional listing))
Check before you order
- Unicel 4CH-926 lists length 13-1/2" vs 13-3/16"; measure before ordering.
Published dimensions, side by side
Each manufacturer measures a little differently. Compare these with your old cartridge.
Where to buy
Search any retailer for 4CH-926 or PWW25L. These are the same cartridge under different brand names.
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OEM part numbers this cartridge replaces
As printed in the cited aftermarket catalogs. Match the number on your old cartridge or in your spa manual exactly.
| OEM number | Listed in |
|---|---|
817-4025 | Unicel p.64: OEM cross reference: Waterway Plastics |
Hot tub brands that use it
From the spa-manufacturer cross reference in the Unicel 2026 Replacement Guide. A brand may use several sizes, so check your measurements.
- Waterway Plastics (models: Teleweir Skim Filter; OEM 817-4025) Unicel p.64
FAQ
What is the Unicel equivalent of Pleatco PWW25L?
The catalogs cross-reference Pleatco PWW25L to Unicel 4CH-926.
What is the Filbur equivalent of Pleatco PWW25L?
We did not find a Filbur equivalent for Pleatco PWW25L in the manufacturer catalogs.
What size is the PWW25L filter?
Pleatco lists PWW25L as 5" outside diameter by 13-3/16" long, top: Handle, bottom: 1-1/2" FEMALE SAE, 25 sq ft.
Which OEM part numbers does it replace?
Listed OEM numbers: 817-4025.
Sources: Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Unicel 2026 Replacement Guide. Last checked 2026-10-21.