Hydro Pool Industries hot tub filters
The Unicel 2026 Replacement Guide lists 2 of the cartridges on this site for Hydro Pool Industries. 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 | Hydro Pool Industries OEM # | Source |
|---|---|---|---|---|---|
| PRB35-IN / C-4335 / FC-2385 | 5" x 9-1/4" | 35 | not specified | not listed | Unicel p.39 |
| PRB75 / C-4975 / FC-2395 | 5" x 20-1/8" | 75 | not specified | not listed | Unicel p.39 |
If your Hydro Pool Industries filter isn't here, it may not be in our checked list yet. We only publish matches we can confirm in a manufacturer catalog.