The  PP-C (Compatible)  Scale Inhibitor cartridge is designed to fit inside the Liff NP1, NDL2 or other manufacturers 10" water filter cartridge housings. The  PP-C inhibits the build up of scale in a domestic water system and can be installed on the incoming main if required. The PP-C doses the water with food grade Siliphos.

CHANGING THE FILTER CARTRIDGE. It is recommended that PP-C water filter cartridges are changed at least every 12 months, but on occasions it may be necessary to change the water filter cartridge more frequently.