Find your hot tub filter
Find the exact replacement hot tub filter by part number, tub brand or size, checked against manufacturer catalogs.
No number on your filter? Search by size
Measure the length end cap to end cap, not counting handles or threads. How to measure
Popular cartridges
- PRB50-IN / C-49505" x 13-5/16" · 50 sq ft
- PRB25-IN / C-43265" x 13-5/16" · 25 sq ft
- PRB35-IN / C-43355" x 9-1/4" · 35 sq ft
- PRB75 / C-49755" x 20-1/8" · 75 sq ft
- PCAL100 / C-49955" x 23-5/8" · 100 sq ft
- PWW50P3 / 6CH-9406" x 7-5/8" · 50 sq ft
- PWW50L / 4CH-9495" x 13-3/16" · 50 sq ft
- PWW35L / 4CH-9355" x 8-1/2" · 35 sq ft
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Why trust this lookup?
Every cross reference here comes from a filter manufacturer's own catalog, and we link the exact PDF page. When two catalogs disagree on size by more than a small tolerance, we leave the match out instead of guessing. Read our accuracy policy.