Reduces 24 contaminants, including pharmaceuticals, waterborne parasites, lead, pesticides, asbestos and industrial chemicals (NSF certified). You can feel reassured that you and your family are getting the most out of your water. Certified to fit these leading refrigerator brands: Whirlpool, MAYTAG, KitchenAid, JENN-AIR and Amana. Used in side-by-side, top freezer and bottom freezer refrigerators. Remember to replace your refrigerator filter every 6 months or 200 gallons to maximize contaminant reduction.