Product Overview4 STAGE WALL MOUNT FILTRATIONEnjoy the clean, refreshing taste of filtered water right from your kitchen sink with this 4-stage water filtration system. This water filtration system is made from high quality components to offer long-lasting, reliable performance while reducing chemicals and improving taste and odor.Note:When adding an Anti-Scale Filter, any KDF should be used and placed before the Anti-Scale to work correctly.White filter housing are recommended to be replaced once every 2 years.