Filters out dirt, sediment, rust and other particulate matter. Takes out disinfectant chlorine and the taste and odor associated with chlorine. Takes out offensive tastes and odors. Inhibits corrosion and the formation of scale (lime-scale/calcium carbonate). Includes inlet shut-off valve. Inlet and outlet are 1/2” NPTF (female). System feed must be cold water only. Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system. NSF.