EveryDrop by Whirlpool Refrigerator Water Filter 4 (Pack of 2) EveryDrop Filter 4 is the only filter Certified by Whirlpool Corporation to work with your Whirlpool, Maytag, KitchenAid, JennAir, and Amana refrigerator. NSF Certified to Reduce the Most Contaminants. Reduces 23 contaminants, including pharmaceuticals, waterborne parasites, lead, mercury, and pesticides Certified to fit these leading refrigerator brands: Whirlpool, MAYTAG, KitchenAid, JENN-AIR and Amana. The only Genuine Replacement for the discontinued UKF8001 Used in bottom freezer and side-by-side refrigerators which accept Filter 4 Replace filter every 6 months or 300 gallons to maximize contaminant reduction