Thermostatic Mixing Valve & Remedial Plumbing

While raising your temperatures to 60°C or above is a great way of controlling the risk of Legionella in your water, it also introduces a level of scald risk at your outlets. This is where installing a thermostatic mixing valve (TMV) will allow you to keep your water safe from bacteria and avoid coming in contact with dangerously hot water.

These anti-scald measures are widely used across a number of properties where the general public and those more susceptible to scalding have access to hot water.

How a thermostatic mixing valve works

As the name suggests, these valves operate by mixing hot and cold water together in order to produce a harmless blend of water at the outlet. The temperature can be adjusted by increasing or decreasing the amount of cold water that enters the mix.

Temperatures should be set according to HSG 274 part 2 and HTM 04-01 supplement D08, which recommend a range of 38°C – 46°C depending on the intended use of the outlet.

Here are the advised temperatures for a range of common assets:

  • Bidet – 38°C
  • Shower – 41°C
  • Washbasin – 41°C
  • Bath – 44°C to 46°C
Cross Section of a Thermostatic Mixing Valve
A thermostatic mixing valve regulates temperature output by mixing hot & cold water to a set blend.

However, simply installing a thermostatic mixing valve isn’t enough to guarantee protection. In order to ensure continued service and protection, these valves must be serviced at least once a year.

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Remedial Plumbing Service

There’s always a possibility that a risk assessment will highlight some issues with a water system, this could be redundant pipework and assets or opportunities to improve the flow of water.

These actions might seem pretty inconsequential at the time but can help prevent a magnitude of issues further down the line. We recommend completing all the recommended actions within your risk assessment in order to help control the risk in your water.

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Water Safe

Whether it's just a service or a new install, we've got you covered

Our team of water safety experts is here to help you with all aspects of your control regime, whether that’s providing impartial advice or carrying out routine monitoring tasks.

So get in touch today and see how we can help.