Pleatco PA50 = Unicel C-7656 = Filbur FC-1240
50 sq ft pool filter, 7" diameter × 19-3/4" long. Top: 3" open · Bottom: 3" open. Pleatco application: Hayward Star-Clear C500, Hayward Easy Clear C550, Pentair Purex CF-50, open/w molded gasket.
Interchangeable cartridges
- Unicel C-7656 confirmed by: Pleatco p.47 (Unicel to Pleatco cross reference) Unicel p.17 (Cartridges by series (dimensional listing))
- Filbur FC-1240 confirmed by: Pleatco p.48 (Filbur to Pleatco cross reference)
Published dimensions, side by side
Each manufacturer measures a little differently. Compare these with your old cartridge.
Where to buy
Search any retailer for C-7656 or PA50 or FC-1240. 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 filter manual exactly.
| OEM number | Listed in |
|---|---|
CX500RE | Pleatco p.33: OEM part # column Unicel p.38: OEM cross reference: Hayward Pool Products |
CX550RE | Pleatco p.33: OEM part # column |
R173409 | Pleatco p.33: OEM part # column |
27-079 | Pleatco p.33: OEM part # column |
Pool filters and equipment brands that use it
From the OEM cross reference in the Unicel 2026 Replacement Guide. A brand may use several sizes, so check your filter model and measurements.
- Cal Spas Unicel p.30
- Hayward Pool Products (models: Star-Clear C500; OEM CX500RE) Unicel p.38
- Hollibaugh Spas Unicel p.39
- PDC Spas Unicel p.47
FAQ
What is the Unicel equivalent of Pleatco PA50?
The catalogs cross-reference Pleatco PA50 to Unicel C-7656.
What is the Filbur equivalent of Pleatco PA50?
The catalogs list Filbur FC-1240.
What size is the PA50 filter?
Pleatco lists PA50 as 7" outside diameter by 19-3/4" long, top: 3" open, bottom: 3" open, 50 sq ft.
Which OEM part numbers does it replace?
Listed OEM numbers: CX500RE, CX550RE, R173409, 27-079.
Sources: 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 2026-11-03.