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Hot Tub & Spa Filter Cartridges
Replacement Spa Cartridge for Hot Spring / Watkins — Compatible with Pleatco PWK30 / Unicel C-6430 / Filbur FC-3915
$17.99Change 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) | Watkins 31489 |
|---|---|
| Filtration / build | 30 sq ft — Hot Spring / Watkins spas (non-Tri-X models) |
| 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 →