A water treatment assembly includes a housing having a plurality of water treatment component interfaces. The water treatment assembly also includes a plurality of water treatment components selected from a group of a particulate filter component, a taste and odor filter component, a lead and mercury filter component, a water softener component, and a water disinfection component, wherein each of the water treatment components are coupled to a respective one of the water treatment component interfaces. Plumbing lines provide flow communication between the components, and the plumbing lines include a system water inlet and a system water outlet.