This Hot Water Temperature Control Valve, 3/4 IN Watts Model 1170, is specifically designed for mixing hot and cold water on hot water supply systems. It can be used for a variety of applications to reduce the temperature of the hot water from the system, and is ideal for radiant heat applications. The valve features a "double throttling" design which combines the control of the hot and cold water to provide a sensitive response to changes in water temperature passing through the mixing chamber.