Pleatco PGS25P4 = Unicel 4CH-24 = Filbur FC-0131
25 sq ft hot tub filter, 4-5/8" diameter × 9-3/4" long. Top: Handle · Bottom: 1-1/2" MPT. Pleatco application: After Hours Spas, Nemco Spas, Threaded 25, Top Load.
Interchangeable cartridges
- Unicel 4CH-24 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.7 (Cartridges by series (dimensional listing))
- Filbur FC-0131 confirmed by: Pleatco p.48 (Filbur to Pleatco cross reference) Filbur p.33 (Reverse cross reference (Unicel to Filbur))
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-24 or PGS25P4 or FC-0131. 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 |
|---|---|
20254-238 | Pleatco p.31: OEM part # column Unicel p.55: OEM cross reference: Saratoga Spas |
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.
- Advanced Spa Design Unicel p.26
- Blue Ridge Spas Unicel p.30
- CTA Spas Unicel p.32
- Dream Maker Spas Unicel p.34
- Gatsby Spas Unicel p.36
- Heartland Spas Unicel p.39
- Hydro Spa Unicel p.39
- Icon Spas Unicel p.39
- Imperial Spas Unicel p.40
- LA Spas Unicel p.43
- Lowes Unicel p.44
- Lumi-O Unicel p.44
- Mountain Meadows Spa Unicel p.45
- Mountain Mist Spa Unicel p.45
- Mountain Springs Spa Unicel p.45
- Mountain Stream Spa Unicel p.45
- Nemco Unicel p.46
- Saratoga Spas (OEM 20254-238) Unicel p.55
- White Springs Spas Unicel p.65
FAQ
What is the Unicel equivalent of Pleatco PGS25P4?
The catalogs cross-reference Pleatco PGS25P4 to Unicel 4CH-24.
What is the Filbur equivalent of Pleatco PGS25P4?
The catalogs list Filbur FC-0131.
What size is the PGS25P4 filter?
Pleatco lists PGS25P4 as 4-5/8" outside diameter by 9-3/4" long, top: Handle, bottom: 1-1/2" MPT, 25 sq ft.
Which OEM part numbers does it replace?
Listed OEM numbers: 20254-238.
Sources: Filbur Product Catalog and Reference Guide (2024) · Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Pleatco 2023 Catalog & Cross Reference Guide (Pentair) · Unicel 2026 Replacement Guide. Last checked 2026-10-21.