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