Unicel 4CH-20 Replacement Filter Cartridge | 20 sq. ft. | 1-1/2" MPT Bottom C8425 Reusing aged seals with a

Reusing aged seals with a new header is a common cause of post-service leaks

Size: 18' x 40'

Ensure all spa and hot tub equipment is working properly

resisting channeling and maintaining reliable dirt capture across its full service life

Unicel 4CH-20 Replacement Filter Cartridge | 20 sq. ft. | 1-1/2" MPT Bottom C8425 Reusing aged seals with aThe Unicel 4000 Series 4CH 20 is a 20 sq. ft. replacement filter cartridge built for top load spa skimmer systems. Its 1 1 2" male threaded (MPT) bottom connection makes it a direct thread replacement for a wide range of spa filter housings no adapter required in most applications. With 204 precision pleated panels of 3 oz. Reemay 2033 spunbond polyester media, this cartridge delivers consistent filtration performance and extended media life.