Marketing InformationThis 1/2 in hot water extender mixing valve is designed for domestic water supply systems and recommended for lower Tempered® radiant heat applications installed at or near the boiler or hot water heater. It consists of a lead-free brass body, threaded connections, thermostat, stainless steel springs and dial adjustment cap. The hydraulically operated thermostat opens a spring loaded check in the cold water inlet which allows cold and hot water to mix and can be replaced as a unit. The low temperature range is 100 to 130 deg F.