This blending valve is designed to deliver safe thermostatically controlled hot water to our infra red taps, self closing taps and is also suitable for use with our self closing timed shower valves which are all single feed. This valve has 15mm connections and is suitable for use with a single infra red tap. If you are planning to use this with two or more infra red taps that are going to be used at the same time then the 22mm blending valve is recommended. This valve offers confidence with TMV3 protection. TMV2 approved thermostatic valves provide protection against scalding by automatically controlling the water temperature, and cutting the flow of water if the temperature rises too high. Guaranteed for 10 years.