TMV, RPZ Valve and Legionella Testing Specialist

tmv testing logo


A Thermostat Mixer Valve is a device that combines hot and cold water to deliver a safe temperature of between 38°c and 45°c for various applications, such as showers or faucets.

Compliance ensures that Thermostatic Mixing Valves meet safety standards and regulations, preventing potential hazards such as scalding or temperature fluctuations.

Mandatory Requirements of

The Australian Standards AS4032.3 specify that testing and maintenance of TMV’S are to occur at intervals of no more than 12 months to ensure the delivery of water at a safe temperature. In some cases more frequent servicing may be required depending on Legionella control and /or water condition. We can work with you to establish an effective management plan, provide our industry specific maintenance reports and ongoing advice to support your plan.

No. To be able to provide testing CPCPWT4023A must be attained through a registered training body. Plumbers must also be familiar with the manufacturer’s and suppliers latest published installation, commissioning, operation, service and site maintenance instructions relevant to the particular model of equipment installed.

We ensure that the manufacturers instructions are incorporated into our procedure in addition to the following activities and reporting on each Thermostatic Mixing valve.

Strainer cleanliness;

Discharge temperature measured at the nearest outlet for high and low flow;

Test non-return valve  operation;

Test cold water shut off operation, and

Test hot water shut off operation.

When the device is not functioning in accordance with the application requirements, the problem will be rectified or the device replaced.

At intervals not exceeding 5 years from commissioning, the replacement and lubrication of dynamic O rings and seals is required.

In addition our testing equipment is calibrated every 12 months in accordance with Australian Standards.


A serious risk to major water supply systems is the possibility of backflow of contaminated water from hazardous sites into the potable water mains. Prevention is therefore important to prevent cases of poisoning or even fatalities.

Backflow Prevention Devices known as Reduced Pressure Zone (RPZ) and double-check valves form a barrier and minimise the risk to the water supply.

To perform a Backflow test, the downstream isolating valve is closed.

Backflow gauges are used to test the the Isolating, Upstream non-return, Relief and Downstream non-return Valves. 

Testing is required annually in accordance with Australian Standards for high and medium hazard devices.

Legionnaires disease is an infection of the lungs (pneumonia) caused by a bacteria of the Legionella family and can occur after a person breathes in contaminated water vapour. 

Legionnaire’s disease is a risk in warm water systems as the optimum temperature for growth is 20°C to 50°C and warm water systems are designed to deliver water at less than 60°C at each outlet point. To ensure safety water sampling must occur following relevant Australian Standards and Codes of Practice relevant to your state and facility. We can provide advice and sampling specific to your facility.

Are you ready to work together