Liff PP Polyphosphate Water Filter Cartridge

Liff PP Polyphosphate water filter cartridge Designed to fit inside the Liff NP1, NDL2 or NCP1 10" water filter cartridge housings. The Liff PP inhibits the build up of scale in a domestic water system and can be installed on the incoming main if required. The Filter doses the water with food grade polyphosphate.How Big Is It ?Approx 10" x 2.5"Life span approx 6 month subject to incomming water condition and usage