Water that tastes like it's fresh from a mountain stream! Installs under counter on the cold water line using 1/2" threaded fittings. Features KDF media to remove inorganic contaminants before they reach the carbon bed protecting it from bacteria fouling and build-up. Interchanges with other brand #3 filters. Replacement recommended every 12 months or when you notice a change in taste, odor or if flow of water diminishes.