This 10 ½ inch long and 6 inch wide replacement filter cartridge has 1 15/16 inch open hole both at top as well as bottom. This filter cartridge can replace Unicel # C-6430, Pleatco # PWK30, Filbur # FC-3915 and OEM # 31489 as other technical specification. It can bear the top load of 30 sq ft. and is best for Hot Spring Spas, Watkins Mfg., Hot Spot, Tiger River, etc. It provides you neat and clean water for your spas and swimming pools free from dust, sand and worms.
Interchangeable Part Numbers