An advanced four stage filtration process to help provide superior quality drinking water at less cost than bottled water. This system provides sanitary quick change filter cartridges which help provide fast and easy cartridge change-outs and all the installation hardware necessary to install, plus includes a dedicated polished chrome faucet. The Ap-RO5500 system also includes an advanced automatic shut-off which helps promote peak efficiency and water conservation. This reverse osmosis system is NSF listed to reduce chlorine taste & odor, lead, parasitic protozoan cysts, arsenic, TDS, radium, barium, cadmium, chromium, Copper, fluoride and selenium from drinking water helping to provide cleaner, clearer, better tasting drinking water for you and your family.