The BEECO Friendly Reduced Pressure Zone Backflow Preventer (FRP) is designed to stop the reverse of flow of a liquid into a potable water system. The proper installation of a backflow preventer must be done by a certified expert under local codes and guidelines to assure the protection of the drinking water system. The Valve shall be certified to ASSE 1013, CSA B64.4 and IAPMO listed.