Spa filter cartridgesClarathon FC-2390 Spa Filter (replaces Pleatco PRB50-IN / Unicel C-4950)
50 sq ft top-load cartridge used in many Rainbow, Waterway and generic spas.
$36.99+ $6.99 shipping
Hot tub filters & cartridges
A clogged filter is behind most hot tub flow errors and many no-heat calls. Find your cartridge by the number printed on the end cap (Unicel C-xxxx or 4CH/5CH/6CH, Pleatco PRB/PWW/PAS, Filbur FC-xxxx), then check length, diameter and end-cap style. Rinse every 1–2 weeks and soak monthly; replace every 12–18 months.
Not sure which one you have? See hot tub not heating or ask a tech on video.
Spa filter cartridges
Spa filter cartridgesClarathon FC-2375 Spa Filter (replaces Pleatco PRB25-IN / Unicel C-4326)
25 sq ft cartridge for smaller spas and skimmer baskets.
$34.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-3960 Spa Filter (Hot Spring / Watkins, replaces PWK65 / C-8465)
65 sq ft filter for Hot Spring and Watkins spas.
$66.99+ $6.99 shipping
Spa filter cartridgesHurricane HF6H940-01 Filter (replaces Unicel 6CH-940, Waterway 817-0050)
45 sq ft front-access skimmer filter for Waterway equipment.
$48.99+ $8.99 shipping
Spa filter cartridgesHurricane HF4950-01 Filter (replaces Unicel C-4950)
Premium-media version of the common 50 sq ft cartridge.
$41.99+ $8.99 shipping
Spa filter cartridgesClarathon FC-3077 Spa Filter PWW10 C-4310
Cross-references Unicel C-4310 / PWW10. Match length, diameter and end caps to your old filter.
$21.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-2320 Spa Filter PRB14.5 C-2302
Cross-references Unicel C-2302 / PRB145. Match length, diameter and end caps to your old filter.
$21.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-3915 Spa Filter for Hot Spring/Watkins PWK30 C-6430 31489
Cross-references Unicel C-6430 / PWK30. Match length, diameter and end caps to your old filter. Fits Hot Spring, Watkins.
$36.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0170 Spa Filter PWW35L 4CH-935
Cross-references Unicel 4CH-935 / PWW35L. Match length, diameter and end caps to your old filter.
$34.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0172 Spa Filter PWW50L 4CH-949
Cross-references Unicel 4CH-949 / PWW50L. Match length, diameter and end caps to your old filter.
$34.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-2970 Spa Filter PLBS50 C-5345
Cross-references Unicel C-5345 / PLBS50. Match length, diameter and end caps to your old filter.
$36.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0311 Spa Filter PAS50SV-F2M 6CH-502
Cross-references Unicel 6CH-502 / PAS50SVF2M / FC-0313Q. Match length, diameter and end caps to your old filter.
$49.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-2395 Spa Filter PRB75 C-4975
Cross-references Unicel C-4975 / PRB75. Match length, diameter and end caps to your old filter.
$61.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-2399 Spa Filter PFF25P4 4CH-22
Cross-references Unicel 4CH-22 / PFF25P4. Match length, diameter and end caps to your old filter.
$34.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-1240 Spa Filter PA50-4 C-7656 C-500
Cross-references Unicel C-7656 / C-500 / FC-0620. Match length, diameter and end caps to your old filter.
$59.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-1977 Spa Filter for Pentair/Waterway PCC105 C-7471 R173476 570-0425-07
Cross-references Unicel C-7471 / PCC105. Match length, diameter and end caps to your old filter. Fits Waterway, Pentair.
$99.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-2324 Spa Filter PRB8.5 C-2303
Cross-references Unicel C-2303 / PRB85. Match length, diameter and end caps to your old filter.
$23.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0125 Spa Filter PHC25P4 4CH-20
Cross-references Unicel 4CH-20 / PHC25P4 / PSG25P4. Match length, diameter and end caps to your old filter.
$30.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0141 Spa Filter PTL25P4-4 4CH-30
Cross-references Unicel 4CH-30 / PTL25P44. Match length, diameter and end caps to your old filter.
$30.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-3071 Spa Filter for American Spas PGS25-XP4 C-4324
Cross-references Unicel C-4324 / PGS25XP4. Match length, diameter and end caps to your old filter. Fits American Spas.
$32.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0126 Spa Filter PSANT20P3 4CH-925
Cross-references Unicel 4CH-925 / PSANT20P3. Match length, diameter and end caps to your old filter.
$32.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0131 Spa Filter PGS25P4 4CH-24
Cross-references Unicel 4CH-24 / PGS25P4. Match length, diameter and end caps to your old filter.
$34.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-1330 Spa Filter PJW23 C-5601
Cross-references Unicel C-5601 / PJW23. Match length, diameter and end caps to your old filter.
$34.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-2385 Spa Filter PRB35-IN C-4335
Cross-references Unicel C-4335 / PRB35IN. Match length, diameter and end caps to your old filter.
$34.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-1425 Spa Filter PJ25-IN-4 C-5625
Cross-references Unicel C-5625 / . Match length, diameter and end caps to your old filter.
$36.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0310 Spa Filter PTL25W-SV-P4-4 6CH-26
Cross-references Unicel 6CH-26 / PTL25WSVP44. Match length, diameter and end caps to your old filter.
$36.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-2811 Spa Filter for Jacuzzi/Tuff Spas PJW40SC-F2M 5CH-402 6540-723
Cross-references Unicel 5CH-402 / PJW40SCF2M / PGC43-F2M. Match length, diameter and end caps to your old filter. Fits Jacuzzi.
$36.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0196 Spa Filter PPM35SC-F2M 5CH-352
Cross-references Unicel 5CH-352 / PPM35SCF2M / C5303. Match length, diameter and end caps to your old filter.
$38.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0300 Spa Filter PAS35P4 5CH-35
Cross-references Unicel 5CH-35 / PAS35P4. Match length, diameter and end caps to your old filter.
$38.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0420 Spa Filter PAS35-F2M 7CH-322
Cross-references Unicel 7CH-322 / PAS35F2M. Match length, diameter and end caps to your old filter.
$39.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-2386 Spa Filter Twin-Pack PRB17.5SF-PAIR C-4401
Cross-references Unicel C-4401 / PRB175SFPAIR. Match length, diameter and end caps to your old filter.
$39.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-2401 Spa Filter PFF50P4 5CH-45
Cross-references Unicel 5CH-45 / PFF50P4. Match length, diameter and end caps to your old filter.
$43.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0303 Spa Filter for Advanced Spa Design/LA Spas PLAS35 5CH-203
Cross-references Unicel 5CH-203 / PLAS35. Match length, diameter and end caps to your old filter. Fits LA Spas, Advanced Spa Design.
$44.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-0315 Spa Filter PTL47W-P4 6CH-47
Cross-references Unicel 6CH-47 / PTL47WP4. Match length, diameter and end caps to your old filter.
$44.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-2402 Spa Filter PFF42TC-P4 5CH-37 303279
Cross-references Unicel 5CH-37 / PFF42TCP4. Match length, diameter and end caps to your old filter.
$48.99+ $6.99 shipping
Spa filter cartridgesClarathon FC-2971 Spa Filter PLBS75 C-5374
Cross-references Unicel C-5374 / PLBS75. Match length, diameter and end caps to your old filter.
$53.99+ $6.99 shipping
Filter accessoriesPreFresh Spa & Pool Fill Filter
Screws onto your garden hose to filter metals and sediment on refill.
$41.99+ $6.99 shipping
Filter accessoriesFilter Canister Lid O-Ring - 6¼"
Small filter-side parts that keep the cartridge housing sealed and the water clean. Fits Jacuzzi, Waterway, Rainbow and more.
$11.99+ $6.99 shipping
Filter accessoriesFilter Flosser
Small filter-side parts that keep the cartridge housing sealed and the water clean.
$49.99+ $8.99 shipping
Filter accessoriesHayward Filter Cleaning Wand Jet Action (EC2024)
Small filter-side parts that keep the cartridge housing sealed and the water clean. Fits Hayward.
$91.99+ $10.99 shipping
No matches. Try a part number, or ask us to find it.