This is the maintenance-free water filter that provides up to ten years of cleaner, better tasting drinking water. The unit can filter 20,000 gallons of water--the average amount consumed by a family of four in a decade--without requiring you to replace cartridges. Certified by NSF International (a public health and safety organization), the filter uses a patented five-stage filtration system to remove 97.3% of chlorine, a chemical responsible for unpleasant odors and tastes in drinking water. Requiring only minutes to install, the filter comes with a diverter valve that screws onto a faucet and reroutes water to the filter via a 33" hose. About the size of a bottle of hand soap, the filter sets up unobtrusively on a countertop or sink ledge and provides a vigorous stream of water. To rinse dishes using the faucet, simply turn the knob on the diverter cap. 9 1/4" H x 3 3/4" Diam. (3 lbs.)