HOT WATER TANK BOOSTER: Water heater booster with temperature actuated mixing valve and gauge mixes hot water with cold to deliver tempered water at a controlled temperature; works with gas, power vent, electric, and tankless heaters PROVIDES SAFE TEMPERATURE: Water heater booster helps to prevent injury from scalding when showering,by regulating the temperature output to 120 degrees F (49 degrees C); can be turned up to 140 degrees F (60 degrees C) EASY TO INSTALL: Anti scald mixing valve features innovative push to connect technology to allow for easy installation with PEX pipe, PE-RT, CPVC, and copper; no soldering, glue or crimping necessary LEAD FREE: Thermostatic mixing valve with gauge is composed of strong and sturdy lead free DZR brass CERTIFIED: Shower mixing valve is certified for both residential and commercial applications; ASSE 1017 and 1070 listed, CSA B125.3 listed, NSF/ANSI 372 and NSF/ANSI 61 certified