Home / Spa filters / 817-2500 / R173429
Hot Tub & Spa Filter Cartridges
Replacement Spa Cartridge — Compatible with Pleatco PRB25-IN / Unicel C-4326 / Filbur FC-2375 (25 sq ft drop-in)
$12.99Change every 4 months
Guaranteed to fit these models
We verified this part against the models listed. If it doesn't fit a model we named, the return ships on us.
| Replaces (OEM ref) | 817-2500 / R173429 |
|---|---|
| Filtration / build | 25 sq ft — DROP-IN. Authoritative Unicel = C-4326 (C-4625 is an old/incorrect listing). |
| Grade | Reemay polyester pleated media |
| Pack | 1 cartridge |
| Replacement window | Change every 4 months |
Price shown is a representative market price for the compatible part (market_snapshot); on the live store the price you see is the price you pay. Fit data is manufacturer-documented. Generic vs OEM →