Unicel 4CH-24 Replacement Filter Cartridge | 25 sq. ft. | 1-1/2" MPT Bottom C8416 and not your skimmer walls

and not your skimmer walls and components

older testing methods

The Unicel 5CH-502 is a 50 sq

a stainless steel shaft

Sanitizer level should be below 5ppm before adding this product

Unicel 4CH-24 Replacement Filter Cartridge | 25 sq. ft. | 1-1/2" MPT Bottom C8416 and not your skimmer wallsThe Unicel 4CH 24 is a 4000 Series 25 sq. ft. replacement spa filter cartridge engineered for top load filter housings that use a 1 1 2" male pipe thread (MPT) bottom connection. With 173 pleats of 3 oz. Reemay 2033 polyester media packed into a compact 9 3 4" body, this cartridge delivers exceptional dirt holding capacity and water clarity in spa and hot tub applications. IMPORTANT: Dream Maker Spa Owners Read Before Installing Some Dream Maker spa