TMV or Thermostatic Mixer Valve is a device that is designed to control mixed water temperature for showers, baths and other outlets. These devices require servicing on a regular basis in order for them to function correctly. Legionella Management Solutions provides TMV (Thermostatic Mixing Valve) servicing across the UK.

To comply with Legionella prevention guidance water must be stored at no less than 60 degrees and distributed at no less than 50 degrees (55 degrees in healthcare premises). However where the risk of scalding has been identified, TMV’s are fitted to regulate the temperature at the outlets.

TMV’s work by reducing the amount of hot water that mixes with the cold water so that the overall temperature is always between 39-41 degrees. TMV valves are designed to automatically shut off the hot water if the cold water fails which is necessary to avoid scalding. TMV’s also go out of the required temperature setting so they could be producing water that is between 20-39 degrees, an ideal breeding ground for Legionella bacteria.

Servicing a TMV valve involves removing the valve, dismantling it, cleaning and disinfecting it, replacing any O rings, re-fitting and re-commissioning it. Once the temperature has been correctly set a failsafe test is performed to ensure that the hot water cuts out appropriately.

Our services meet the requirements of the HSE and NHS Estates, we dedicate ourselves to providing cost effective solutions in order to reduce the cost of compliance with TMV regulations.

It is a requirement that all TMV’s are tested a minimum of annually to ensure they are still achieving the desired temperature. If temperature control fluctuates more than 2 degrees from the original setting then a full service will be required. The valves can easily become scaled or blocked which needs to be rectified to ensure they work properly.

Legionella Management Solutions’ Engineers have the training and expertise to test TMV’s and carry out replacement or servicing when required.