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 AccuracyIntegral Inlet Strainers and Check Valves are Standard to Protect Against Cross-Flow and Foreign Particles in the Piping SystemThermostat Over-Temperature ControlFingertip Temperature ControlCold or Hot Water Supply Failure Shut-Off ProtectionMultiple Connection Options to Fit Your Specific NeedsLead Free Construction Certified: 0.25% Lead MaxMade in USA - ARRA Compliant