ASSE 1070 For a Broad Range of Installation Types The versatile 5120 Series Lead-Free Mixing Valve (NSF 61, ASSE 1017 and ASSE 1070 certified) provides the ultimate performance for domestic hot water applications. The 5120 Series Lead-Free Mixing Valve ASSE 1017 certification allows for domestic hot water storage at temperatures high enough to increase the effective storage capacity of a water heater, kill harmful bacteria and still be delivered at a safe 120°F or less. The design and advanced thermostatic element ensures a stable mixed water temperature throughout the valve’s adjustable range. The ASSE 1070 listing allows for point-of-use applications in homes, hospitals, schools, nursing homes and public facilities, etc., where a 1070 valve is required.