Thermostatic Mixing Valve (TMV)

A TMV, also known as a Thermostatic Mixing Valve, is a compulsory feature in many buildings, including hospitals, aged care facilities and disability centres.

A TMV blends hot and cold water before reaching the outlet, ensuring safe kitchen, laundry, shower and bath temperatures and preventing scalding.

CRG Plumbing & Maintenance staff are fully qualified and highly experienced in TMV installation and maintenance.

Why choose CRG for your TMV installation and maintenance?

TMV Specialists

CRG are highly experienced commercial plumbers, with a track record of maintaining thermostatic mixing valves for large hospitals and healthcare facilities. We foster long-lasting relationships with your business so that you don’t have to start from scratch each time you need advice or repairs.

Cost-effective

Our strong knowledge of TMVs and backflow means we can provide cost-effective solutions. Where some plumbers may just replace a system, we often find it can be fixed through a simple service or tweak instead.

Quality solutions

Our TMV solutions are high quality, in order to will suit your requirements and last for years to come.

Rapid response times

When things go wrong, we are on-hand to help and quickly solve the problem.

Safety First

Hot running water only takes a second or two for sensitive skin to be burned. A TMV is a simple valve solution that ensures hot water is always mixed with cold before reaching the outlet. This is essential to protect vulnerable people, such as in hospitals, aged care centres or childcare centres.

Legally Required

In Australia, TMVs are required by law in aged care facilities, hospitals, disability care, and child care, and must be serviced every 12 months. CRG Plumbing can put your facility on a regular maintenance schedule, to ensure it gets serviced without you having to worry.

Thermostatic Mixing Valve FAQs

Yes, once installed, it is a legal requirement to have a service every 12 months and, in Australia, a TMV is a required for aged care facilities, hospitals, disability care, and child care hot water outlets.

Yes, thermostatic shower valves can fail. However, do not mistake a thermostatic mixing valve with a thermostatic shower valve, which is generally a simple cartridge replacement.

A mixing valve can last in excess of 15-20 years, but the internals must be replaced every 5 years regardless if they pass the test or not.

Yes, a thermostatic mixing valve can be adjusted, BUT it must be done by a plumber who is licenced and trained in dealing with TMV devices.

A thermostatic mixing valve can be adjusted by adjusting the mixing screw on the valve. However, this MUST be carried out by a licenced and accredited plumber with a calibrated thermometer.

Thermostatic shower valves are worth it if you like the look of them. Although, they are no more cost effective than your traditional hot and cold taps, and do not save any more water. It’s all about the aesthetics.

Depending on the location, the starting price for a supply and installation is $850.

A TMV requires a major service every 5 years, but the valve will only ever need replacing if it fails a test after the service is carried out.

A TMV is a small brass valve that looks like the letter T with hot and cold isolation on each side.

The safety device blends the hot and cold water together to stop scalds or thermo shock by delivering a constant temperature or shutting the water off completely if there is a disruption in either the hot or cold water delivery.

Yes, a TMV mixing valve can be adjusted by the mixing screw on the valve; however, this must be carried out by a licenced and accredited plumber with a calibrated thermometer.


If you need to install a Thermostatic Mixing Valve (TMV) at your commercial property or need to have it serviced, speak to our friendly team today – call 02 4656 4064 for your free quote.