This universal replacement cartridge delivers 25 square feet of filtration area and is compatible with approximately 70% of hot tubs on the market. The filter measures 4-15/16" outer diameter by 13-5/16" in total length, featuring dual 2-1/8" openings at both top and bottom.

For the 50 square foot capacity version of this cartridge, see: Filter Most Popular Size 50sqft 13-5/16" Tall X 4-15/16" Wide (2) 2 1/8" Holes FC-2390 C-4950 PRB50-IN

This industry-standard filter cartridge works with numerous spa and hot tub manufacturers including: Accent, Maax, Apollo, Aqua Mystic, Arctic, Artesian, Beachcomber, Blue Falls, Cal Spa, Coast Mountain, Coleman, Coast, Crystal Waters, Coral, Custom Molded Products, Dakota, Diamond, Dynasty, Emerald, Garden Leisure, Gatsby, GPM, Great Lakes, Great Northern Engineering, Hawkeye, H2O, Haugh's, Hot Spot, Hydrospa, Hydro Spa, Hydrospas, Watkins, Honey Tubs, Infinity, Islander, Jacuzzi Premium, Key, Keys, Keys Backyard, Key Backyard, Leisure Bay, Rec Warehouse, Lifestyle, Maax, Coleman, Nordic, Orca, Pentair, Pac-Fab, Rainbow, Rainbow Dynamic, QCA, River Valley, Rubadub, Safari, Signature, Spa Crest, sparest, Spa Manufacturers, Spa Manufacturers Inc., Streamline, Sun Ray, Four Winds, Sun Ray, Tatum, Thermospa, Thermospas, US Spas, Viking, Destiny River, Water's Edge, Waterway, Top Load, Top-Load, 12502ECO, 3005845, 3301-2242, 25392, FC-1910, FC-2375, C-4326, PLE-051-9174, PLE-051-9395, UNIC4625, 46198, 4900-40, 2501, 17-2327, 17-4821, PRB25-IN-3, PRB25-IN, C-4326, C-5623, 645544023759, 817-2500, 33521