Cal Spa

The Unicel 5CH-752 hot tub filter with a closed top handle and 2 inch male MPT threads bottom fits select Cal Spas models. Cal Spas has used different filter sizes for many of their models over the years, and therefore it’s best to confirm that this filter is the same size as the existing cartridge in your Cal Spa model before ordering to ensure proper fitment. Filter details: Part no: 5CH-752 Diameter: 5-3/16" Length: 16-1/8" Top: Handle Bottom: 2" MPT Thread (Fine) Media 75 sq.ft. Filter Media: 3oz Pleat count: 194 Compatible replacement for: Pleatco PCAL60-F2M Filbur FC-0202. How long should Unicel 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 two years or more, depending on your level of use and cleaning routine.