At Managed Water Services we install, service and replace all TMV’s.
TMV stands for Thermostatic Mixing Valve. This valve secures safe temperatures for your bath or shower by blending the hot and the cold water.
It should be of high priority to service this valve as poorly fitted or dirty TMV’s can be a legionella risk
The hot and cold water temperature blend that enters the TMV is pre-set by the engineers. The thermally sensitive mechanism in the valve will automatically divide out the amount of hot and cold water that enters the valve, so that the output temperature is what is required of the valve.
Some TMV’s should also shut down the flow of the hot water, should the cold water supply fail, so that the output temperature is not hazardously hot. These TMV’s are known as a failsafe type.