Spa brand
Hot Spring filter cartridges
12 rich cartridge records compiled from 3 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 |
|---|---|---|---|---|
| Hot Springs Spas | 31382 | 4CH-35 | PTL35PPTL35P4FC-0161 | cross-checked against 3 sources |
| Watkins Hot Spring Spas | — | 4CH-35 | PTL35PPTL35P4FC-0161 | cross-checked against 3 sources |
| Hot Springs Spas | 303279 | 5CH-37 | PFF42TC-P4FC-2402 | cross-checked against 2 sources |
| Hot Springs Spas | 33521 | C-4326 | PRB25-INFC-2375 | cross-checked against 3 sources |
| Rainbow Dynamic 25 | — | C-4326 | PRB25-INFC-2375 | cross-checked against 3 sources |
| Rainbow Dynamic 25 | — | C-4326 | PRB25-INFC-2375 | cross-checked against 3 sources |
| Hot Springs Spas | 31233 | C-5431 | PWK30VFC-3910 | cross-checked against 2 sources |
| Hot Springs Spas | — | C-5431 | PWK30VFC-3910 | cross-checked against 2 sources |
| Watkins Hot Spring Spas FH/IH 220V Models | — | C-5431 | PWK30VFC-3910 | cross-checked against 2 sources |
| Hot Springs Spas | 31489 | C-6330 | PWK30FC-3915 | cross-checked against 2 sources |
| Hot Springs Spas | — | C-6330 | PWK30FC-3915 | cross-checked against 2 sources |
| Limelight | 1642301-1 | C-6350 | — | single-source |
| Hot Springs Spas | — | C-6350 | — | single-source |
| Limelight | 1642301-1 | C-6355 | — | single-source |
| Hot Springs Spas | — | C-6355 | — | single-source |
| Hot Springs Spas | 31489 | C-6430 | PWK30FC-3915 | cross-checked against 2 sources |
| Hot Springs Spas | — | C-6430 | PWK30FC-3915 | cross-checked against 2 sources |
| Watkins Hot Spring Spas | — | C-6430 | PWK30FC-3915 | cross-checked against 2 sources |
| Hot Springs Spas | 31250 | C-6433 | PWK35FC-3920 | cross-checked against 2 sources |
| Hot Springs Spas | — | C-6433 | PWK35FC-3920 | cross-checked against 2 sources |
| Watkins 33 | — | C-6433 | PWK35FC-3920 | cross-checked against 2 sources |
| Hot Springs Spas | 31115 | C-6600 | PWK25PWK40FC-3930 | cross-checked against 2 sources |
| Hot Springs Spas | — | C-6600 | PWK25PWK40FC-3930 | cross-checked against 2 sources |
| Watkins 45 | — | C-6600 | PWK25PWK40FC-3930 | cross-checked against 2 sources |
| Watkins Hot Spring Spas | — | C-6600 | PWK25PWK40FC-3930 | cross-checked against 2 sources |
| Hot Springs Spas | 31114 | C-8465 | PWK45NPWK65FC-3960 | cross-checked against 3 sources |
| Hot Springs Spas | — | C-8465 | PWK45NPWK65FC-3960 | cross-checked against 3 sources |
| Watkins Hot Spring Spas upgrade from PWK45N 31114 | — | C-8465 | PWK45NPWK65FC-3960 | cross-checked against 3 sources |
| Watkins 65 | — | C-8465 | PWK45NPWK65FC-3960 | cross-checked against 3 sources |
| Watkins Hot Spring Spas upgrade from PWK45N 31114 | — | C-8465 | PWK45NPWK65FC-3960 | cross-checked against 3 sources |
| Rainbow Dynamic 50 | — | C-4950 | PRB50-INFC-2390 | cross-checked against 3 sources |
Spa model names can span multiple model years. Measure before ordering or use the cartridge lookup.