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FC-2399 spa filter equivalents
Part number FC-2399 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.
Freeflow Spas 4CH-22 cartridge (open top), 4-15/16" (125 mm) × 6-5/8" (168 mm), 25 sq ft. Unicel 4CH-22, Pleatco PFF25W-P4.
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| OEM | |
|---|---|
| Unicel | 4CH-22 |
| Pleatco | PFF25W-P4 |
| Filbur | FC-2399 |
| Size | 4-15/16" (125 mm) × 6-5/8" (168 mm), 25 sq ft |
Sources
- Unicel 2026 Replacement Guide: Freeflow model list, PDF p.35 (printed p.31): TLX and RLX = 4CH-22; spec table PDF p.8 (printed p.4): open 2-1/8", 212 pleats, 3 oz, 25 sq ft, model cell TLX, RLX (PDF)
- Pleatco 2023 Catalog: Unicel cross-reference PDF p.47: 4CH-22 = PFF25W-P4. Spec table PDF p.32: PFF25W-P4 at 5" x 6-5/8" for Lagas. Spec table PDF p.31: PFF25P4 at 4-5/8" x 6-5/8" for Lagas, CLX, FF-150 (PDF)
- Filbur Catalog & Reference Guide: Dimensional listing PDF p.9: FC-2399 open, CLX, PFF25P4, 4CH-22. Freedom Spas section PDF p.18 (printed p.35): CLX, FF-150 (PDF)
Not in sources: Model names are swapped: Unicel says TLX/RLX, Filbur and Pleatco's PFF25P4 say CLX. Pleatco equivalent is not one number (PFF25W-P4 on the cross-reference, PFF25P4 in Filbur). Outside diameter 4-15/16" (Unicel, Filbur) vs 4-5/8" (PFF25P4) vs 5" (PFF25W-P4). No Freeflow OEM number in Unicel. FF-150 is Filbur/Pleatco only, so it is not an OEM lookup number..
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