Thermo Spas of Connecticut hot tub filters
The Unicel 2026 Replacement Guide lists 3 of the cartridges on this site for Thermo Spas of Connecticut. Many tubs use only one of these, so measure your old filter or check the number printed on its end cap.
| Cartridge (Pleatco / Unicel / Filbur) | Diameter × length | Sq ft | Models | Thermo Spas of Connecticut OEM # | Source |
|---|---|---|---|---|---|
| PWW10 / C-4310 / FC-3077 | 4-1/4" x 4" | 10 | not specified | not listed | Unicel p.60 |
| PRB25-IN / C-4326 / FC-2375 | 5" x 13-5/16" | 25 | not specified | not listed | Unicel p.60 |
| PWW50P3 / 6CH-940 / FC-0359 | 6" x 7-5/8" | 50 | not specified | not listed | Unicel p.60 |
If your Thermo Spas of Connecticut filter isn't here, it may not be in our checked list yet. We only publish matches we can confirm in a manufacturer catalog.