Sundance #6540-501

The Unicel C-8380 hot tub filter is a compatible replacement for the 6540-501 filter used in Sundance Spas which also has the separate 6540-502 Micro-Clean filter (Sold separately) threaded on to the end. 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-8380 Diameter: 8-7/16" Length: 14" Top: Closed with 2" SAE Thread Bottom: 2-1/2" Open with beveled edge Media: 80 sq.ft. Filter Media: 3oz Reemay Pleat count: 174 Compatible replacement for: Sundance Spas 6540-501 Pleatco PSD85-2002 Filbur FC-2810 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.