Premium 100 Sq Ft Pool Filter Cartridge The Doule King 100 sq ft pool filter cartridge is designed to fit a range of compatible filter models while delivering steady, reliable filtration for your backyard oasis. This replacement cartridge helps maintain clear water and balanced...

Elevate spa maintenance with the Doule King FC-2402 spa filter, a reliable compatible option designed to fit your hot tub’s needs. This filter is built to work with Watkins models 303279, FC-2402, 78460, and PFF42TC-P4 replacements, and is also suitable for Free Flow and...

Refresh Your Spa Filtration with Doule King Keep your hot tub ready for relaxation with the Doule King PRB25 filter replacement. This two-pack is crafted to drop into standard 5x13 cartridges and is compatible with a range of popular models. By providing a reliable...

Introducing the Doule King Yours hot tub filter, a 1 pack replacement designed to fit a range of popular cartridge systems. It is compatible with Unicel 6CH-940 PWW50 and Filbur FC-0359 filters, enabling a straightforward swap for many spa setups. Before ordering, please check...