Hiendure Solid Brass Copper Cartridge 1/2" IPS Male Connections Thermostatic Mixing Valve for Solar Shower System Water Temperature Control, Chromed Connect to hot and cold water - and mixed out Thermostatic Mixing Valve (temperature control) with non-return inlets Cold water supply temperature:4-29C ,hot water supply temperature:55-85C If cold water supply fails ,flow rate will be reduced to virtually shut off which avoid the risk of Temperature accuracy:Kept constant 2C for the setting.