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Shutting off the water as a quick response to cold or hot pressure loss is another function of the thermostatic mixing valve. They often use a wax thermostat for regulation. * Hot Water Heater Control by Thermostatic Mixing Valve - These provide a uniform distribution temperature for all hot water outlets in a household.* Fixture design by use of a local Thermostatic Mixing Valve - These are single Outlet Thermostatic Mixing Valves, often called "thermostatic faucets", "thermostat taps" or "thermostat valves". They are designed for individual showers, hand wash basin mixers, bath or tub fillers.