Pentair Pool Prod hot tub filters
The Unicel 2026 Replacement Guide lists 4 of the cartridges on this site for Pentair Pool Prod. 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 | Pentair Pool Prod OEM # | Source |
|---|---|---|---|---|---|
| PRB25-IN / C-4326 / FC-2375 | 5" x 13-5/16" | 25 | Dynamic Series I RDC-25, Dynamic Series I RDC-25S, Dynamic Series II & III RTL/RCF-25, Dynamic Series IV - DFM,DFML | R173429 | Unicel p.47 |
| PRB35-IN / C-4335 / FC-2385 | 5" x 9-1/4" | 35 | Dynamic Series IV - DFM,DFML | R173431 | Unicel p.47 |
| PRB50-IN / C-4950 / FC-2390 | 5" x 13-5/16" | 50 | Dynamic Series IV - DFM,DFML, Dynamic Series II & III RTL/RCF-50, Dynamic Series I RDC-50, Dynamic Series I RDC-50S | R173434 | Unicel p.47 |
| PRB75 / C-4975 / FC-2395 | 5" x 20-1/8" | 75 | Dynamic Series V - DSC-75, Dynamic Series II & III RTL/RCF-75 | R173435 | Unicel p.47 |
If your Pentair Pool Prod filter isn't here, it may not be in our checked list yet. We only publish matches we can confirm in a manufacturer catalog.