The HomeWater Reverse Osmosis water filter uses 4-stages of filtration for ultimate contaminant reduction. The semi-permeable membrane rinses contaminants to the drain. High quality, filtered drinking water is produced and conveniently stored in a sealed tank. The included lead-free faucet easily delivers an abundant supply of clear and fresh-tasting drinking water to you and your family. Reduces Sediment, Dirt, Chlorine, Dissolved Inorganics, Barium, Cadmium, Hexavalent and Trivalent, Chromium, Lead, Copper, Radium 226/228, Selenium, Fluoride, & Nitrate/Nitrite.