Fits Home Master HydroPerfection Highest quality sediment, catalytic carbon, KDF 85 media and artesian minerals with UV sterilizer Superior design - uses modular filters where the filter element and the filter housing are all-in-one assembly for quick and easy annual filter changes - no wrenches necessary 1/4 in. quick connect fittings on sediment and iron pre-filters 3/8 in. quick connect fittings on artesian post filter