The Apollo 34ALF Series thermostatic master mixing valves are designed for ASSE 1017 "Point of Source" approved applications. They provide hot water temperature control of potable and non-potable hot water distribution systems. The valves are built using lead free* materials and are available with a variety of options and end connections. Superior thermostatic element technology for optimal performance, reliability, and accuracy. Integral inlet strainers and check valves are standard to protect against crossflow and foreign particles in the piping system. Thermostat over-temperature control. Fingertip temperature control. Cold or hot water supply failure shut-off protection. Multiple connection options to fit your specific needs. Lead free construction certified: 0.25% lead max. Made in USA - ARRA compliant.