This Refrigerator Water Filter is used in Whirlpool and Kitchen Aid 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. Filters should be changed every 6 months. Reduces chlorine's taste and odor, particulates, lead, mercury and more. NSF certified.