Series LF2000B Double Check Valve Assemblies prevent the backflow of contaminated water into the potable water supply. It consists of a Lead Free* cast silicon copper alloy body construction that is easy to maintain and service. Series LF2000B is ideal at referenced cross-connections identified as non-health hazard applications. Check with local inspection authorities for installation requirements. The LF2000B features Lead Free* construction to comply with Lead Free* installation requirements. Maximum Working Pressure: 175psi (12.06 bar).