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Replacement parts for the Universal 25 sq ft drop-in spa cartridge (PRB25-IN)
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| Brand | Universal |
|---|---|
| Model | 25 sq ft drop-in spa cartridge (PRB25-IN) |
| Typical use | Entry hard-shell hot tubs — DROP-IN, 25 sq ft (authoritative Unicel = C-4326) |
| Also known as | PRB25-IN, C-4326, FC-2375, 817-2500, R173429, C-4625 |
Compatible parts
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FAQ
What replacement filter fits the Universal 25 sq ft drop-in spa cartridge (PRB25-IN)?
It uses 817-2500 / R173429 (Replacement Spa Cartridge — Compatible with Pleatco PRB25-IN / Unicel C-4326 / Filbur FC-2375 (25 sq ft drop-in)). Our compatible version matches that fit and carries a fit guarantee.
How often should I change the part on a Universal 25 sq ft drop-in spa cartridge (PRB25-IN)?
Typical replacement is Change every 4 months, sooner in dusty or pet homes.