Thermo Spas Spa and Hot Tub Filter Cartridge Sonfarrel 25-220122 UNICEL C-4301 PLEATCO PMT27.5 FILBUR FC-1616 - $16.16 Each When You Buy 5 Filters Purchase a single filter for $19.99 or stock up and save when you buy 5 OR MORE Pleatco Filter with Free-Flow Core Technology for the purest water quality and durability Replaces OEM Filter Brands and Part Numbers: Advantage Manufacturing: 25-220122 Nordic Hot Tubs: 25-220122 Sonfarrel/Martec: 25-220122 Thermo Spas: Sonfarrel 25-220122, 25220122 Measurements: Length: 14-3/4" Outside Diameter: 5" Top Opening: 2-1/8" Bottom Opening: 2-1/8" Total Sq. Ft. 27.5 Other popular brand part numbers Unicel Filter - C-4301, C4301 Filbur - FC-1616, FC1616 Aquakleen - AK-3001, AK3001 Manufactured by Pleatco, guaranteed highest quality or your money back Pleatco Part number: PMT27.5, PMT-27.5 UPC Code: 090164275000 The PLEATCO Difference - Pleatco features a free-flow core designed to produce cleaner water and engineered to be stronger. Others just use PVC pipe with holes that reduce the flow of water. CLEANING TIPS to protect your pool filter pump ~Spray off coarse debris with a garden hose ~After drying, carefully brush off fine particles ~remove oils and algae with a commercial soaking cleaner Availability: Usually ships the same business day. Thermo Spas Spa and Hot Tub Filter Cartridge Sonfarrel 25-220122 UNICEL C-4301 PLEATCO PMT27.5 FILBUR FC-1616 - $16.16 Each When You Buy 5 Filters PMT27.5$19.99, 5/$80.80 Search Here: E-mail Us Privacy Policy Shipping Rates View Cart