WATTS® Double Check Valve Assembly, Series: LF007-QT, 1/2 in Nominal, 175 psi, 33 to 180 deg F, Quarter-Turn Ball Valve, Cast Copper Silicon Alloy Body, Fused Epoxy Coated, 10 in L, Domestic - Series LF007 Double Check Valve Assemblies shall be installed at referenced cross-connections to prevent the backflow of polluted water into the potable water supply. Only those cross-connections identified by local inspection authorities as non-health hazard shall be allowed the use of an approved double check valve assembly. The LF007 features Lead Free construction to comply with Lead Free installation requirements. Check with local authority having jurisdiction regarding vertical orientation, frequency of testing or other installation requirements. The valve shall meet the requirements of ASSE Std. 1015 and AWWA Std. C510. Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California.