Certified to reduce 99% of lead as well as other potentially harmful contaminants, KitchenAid(TM) filters offer convenient, filtered water for you and your family. For the cleanest water, replace your KitchenAid(TM) filter every 6 months (or 200 gallons). KitchenAid(TM) Ice & Water Refrigerator Filter 3 replaces P1WB2 & P1WB2L.