Filter Cartridge tested in accordance with NSF International Standards, NSF/ANSI Std. 42 & 53
Under-the-sink Installation; Individual LED drinking faucet is certified to NSF/ANSI Standard 61 (Drinking Water System Components-Health Effects).
Change the cartridge when the water flow becomes slow. Cartridge life varies by water consumption and water quality but the maximum life is 12 months only.