Spa brand
Softub filter cartridges
3 rich cartridge records compiled from 2 matching source brand entries.
Model and OEM part cross-reference
Model wording is retained from the source. Match the OEM number where present, then verify cartridge dimensions.
| Model | OEM part | Unicel | Pleatco / Filbur | Verification |
|---|---|---|---|---|
| Softub | — | 4CH-20 | PHC25PHC25P4PSG25P4 | cross-checked against 3 sources |
| Softub; Dolphin Spa; Leisure Bay | — | 6CH-25 | PTL20W-SV-PPTL20W-SV-P4FC-0305 | cross-checked against 3 sources |
| Softub | 90-802 | 6CH-25 | PTL20W-SV-PPTL20W-SV-P4FC-0305 | cross-checked against 3 sources |
| Advanced/LA Spas,Threaded 25 sq.ft. w/handle | — | C-4324 | PGS25PGS25P4FC-0187 | cross-checked against 2 sources |
Spa model names can span multiple model years. Measure before ordering or use the cartridge lookup.