The Tier1 3US-AF01 comparable Undersink Filter Replacement Cartridge Comparable by Tier1 is designed to fit the 3US-AS01 Undersink Filter System. This filter reduces chlorine taste and odor, sand, soil, silt, rust, and sediment found in your drinking water. Tier1 water filters install quickly and easily, no tools are required. Each filter lasts for up to six months, depending on use and water quality, making maintenance a breeze! Order today!
