It is used for filtering drinking water & fits 1/2 inch water line. It is 2 inches diameter x 10 inches long & is for use with cold water only. Its flow rate is 2 gallons per minute & filters up to 7000 gallons. It removes bacteria, heavy metals & chemicals. Includes quick disconnect fittings, two 1/2 inch swivel compression fittings, winterizing bypass hose & mounting bracket.