This Project Source S-2-2 replacement refrigerator water filter fits in place of Whirlpool filter model Filter 5. This certified, high quality, economical filter will deliver fresh, crisp, clean tasting water and ice cubes. Certifed to NSF/ANSI standards 42, 53, 372, 401, P473 and CSA B483.1, this filter removes over 80 contaminants including Lead, Cyst, Mercury and Asbestos. Engineered with the power of 0.5 mic coconut shell carbon block, this filter provides tremendous capacity to reduce impurities, sediment and rust that may be present in your drinking water. The carbon block has millions of active sites on its surface and within the structure which can absorb impurities like a sponge and can breakdown and hold other types of impurities on its surface like a magnet. These processes ensure that you are receiving the cleanest and best tasting water possible for you and your family. Using this filter will replace 1500 water bottles reducing the amount of plastic waste in our landfills.