This Refrigerator Water Filter is used in Whirlpool® and KitchenAid® side-by-side and top mount refrigerators with filter access inside the refrigerator. Simply turn the Refrigerator Water Filter 1/4 turn to remove and replace. While retaining beneficial fluoride, this NSF® Certified Refrigerator Water Filter reduces chlorine taste and odor, particulates (class I), lead, and mercury. Replacing this Refrigerator Water Filter every 6 months ensures clean, safe drinking water. Replaces 8171787, 2204324 and 2204326.