Series LF4000B Reduced Pressure Zone Assemblies are designed to protect potable water supplies in accordance with national plumbing codes and water authority requirements. This series can be used in a variety of installations, including the prevention of health hazard cross connections in piping systems or for containment at the service line entrance. The LF4000B features Lead Free* construction to comply with Lead Free* installation requirements. Maximum Working Pressure: 175psi (12.1 bar).