Hot Springs/Watkins Spas

The Unicel C-6430 hot tub filter is a compatible alternative replacement for the Hot Springs Spas 31489 and Watkins WA30TC-3 OEM spa filters. This filter fits various hot tub models by Watkins. For optimal fit and performance, verify that this filter cartridge matches the dimensions of the old filter in your spa. Filter details: Unicel P/N: C-6430 Diameter: 6" Length: 10-1/2" Top: 1-15/16" Open Bottom: 1-15/16" Open Media: 30 sq.ft. Filter Media: 4oz Reemay Brand: Unicel Premium Compatible replacement for: Aladdin 13004 Baleen AK-5005 Darlly 60301 Excel Filters XLS-602 Filbur FC-3915 Filbur FC-3915M Harmsco H-6430 Hot Springs 0969601 Tri-X Filter Magnum HS30 Pleatco PWK30 Pleatco PWK30-M Pure N Clean PC-3915 S D-00328, 00704 Unicel C-6330 Unicel C-6430AM Unicel C-6430RA Watkins OEM 31489, WA30TC-3 How long should Unicel pool and hot tub filters last? While most hot tub filters need to be changed every six to twelve months, Unicel brand filters are made with REEMAY premium trilobal filtration media that delivers 45% more surface area over standard rounded filter fibres and can last up to 18 months or more, depending on your level of hot tub use and filter cleaning routine.