thermostatic mixing valves

Thermostatic mixing valves and regulations you should know

Thermostatic mixing valves and regulations you should be know

The purpose of thermostatic mixing valves (TMV) is to reduce the risks of scalds during bathing, showering, and handwashing. With a fixture that is responsible for protecting users against a serious hazard, there are always likely to be firm regulations in place to make sure they are installed, maintained, and used correctly. When it comes to thermostatic mixing valves, which can also be digital, there are factors to be aware of.

Regulations according to location

You should be aware that TMV regulations vary slightly depending on where you are in the UK. But, in all parts of the UK, there are recommended maximum temperatures depending on the appliance, ranging from 38 to 48 degrees Celcius. Also, in all areas, TMVs are listed as a way for employers to meet their duty of care.

Installation and maintenance

At present, there aren’t any accreditation or certification schemes when it comes to installing or servicing TMV2s. The only exception is a competent person must install it. You can see this in the BuildCert approval guidelines. However, terms like ‘competent’ can allow for error if there is no way of knowing whether a person is competent. It is always best to hire a professional company with notable, extensive plumbing experience, to ensure your TMV protects users from harm.

TMV2s should all be subject to an annual functionality test. The BuildCert TMV2 scheme notes that it is a requirement to verify TMV2s against the original set temperature once a year by measuring the mixed water temperature at the outlet and cold water supply isolation testing.

TMV3s, on the other hand, require stricter maintenance. They are for use specifically in healthcare environments where people are vulnerable to scolds. TMV3s stick to NHS D08 regulatory standards, being able to work at much higher pressures, from 0.2 bar to 10 bar. You should check, clean and maintain the valves regularly to prevent the risk of bacterial outbreaks, particularly Legionella. You should test valves regularly for this bacteria and disinfect.

It is possible to install a TMV in the wrong place or incorrectly, which is why it is imperative you reach out to the professionals to take care of the installation process. You can prevent unnecessary injuries by ensuring you have the correct TMV valve and it is working correctly.

Give Higgins a call today for more information about our TMV installation and maintenance services on 01625 613308. We have a range of services that make safety a top priority.