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TMV Testing

Thermostatic mixing valve testing Sydney

Everyday Plumbing and Gas Services plumbers can take care of your routine TMV testing and maintenance requirements throughout the Sutherland Shire and Sydney's southern suburbs. 



Facilities have a duty of care to maintain a safe environment for all those using their property. This includes the delivery of hot water at a safe temperature, whilst reducing the risk of Legionella bacteria growth in water storage tanks. This can be achieved by installing and maintaining a thermostatic mixing valve (TMV).

The TMV blends hot water with cold to reduce the temperature of the water coming from the hot water system from the storage temp of 60℃+ to a much safer 50 or 45℃ outlet temperature. This measure helps prevent scalding and burns.

Thermostatic mixing valves are often installed in the following centres to ensure delivery of a constantly safe hot water supply:

  • Nursing homes
  • Child care centres
  • Shopping and retail centres
  • Respite facilities
  • Aged care facilities
  • Hospitals
  • Schools and after school care
  • Restaurant bathrooms and hand wash areas

Thermostatic mixing valve maintenance

Due to the high-risk groups who use these facilities TMV testing and maintenance needs to be carried out regularly to ensure a consistent hot water temperature.

Required testing schedule

Australian Standard AS4032.3 TMV testing requirements:

  • Thermostat and o-rings replaced every 5 years
  • Testing, inspection and maintenance every 12 months

Recommended servicing and tests

Testing and maintenance of the TMV:

  • Cleaning debris out of the strainer
  • Check non-return valve operation
  • Check discharge temperature at the nearest outlet
  • Test hot and cold water shut off function
  • Replace (every 5 years) or lubricate (yearly) dynamic o-rings

Your local TMV test and servicing specialists

For all your thermostatic mixing valve requirements in Sydney’s south and Sutherland Shire give our plumbers a call on 0406 400 200 or complete our quick online plumber booking request today.


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