The Aqua-Pure?Drinking Water System AP-DWS1000 reduces chlorine taste and odor, particulate, lead, VOCs, parasitic protozoan cysts, and MTBE from drinking water. The water filter system uses advanced dual-stage carbon-block filtration, providing tasty, clear water and protecting plumbing and fixtures. The Aqua-Pure AP-DWS1000 is designed with a built-in shut-off meter that automatically shuts off the system after 625 gallons/2,366 liters of water have been filtered. To change cartridges, simply twist off the old cartridge and twist on a new one-no tools required and no contact with soiled material. Used to help improve water quality in food service operations, businesses and homes, drinking water filtration systems range from complex multi-filter systems at the point where water enters the house, to simple plug-in under sink units easily installed on the water line.