TMV, RPZ Valve and Legionella Testing Specialist

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Thermostatic Mixing Valves Scald Prevention

A Thermostatic Mixing Valve blends hot water with cold water to produce an even temperature (maximum of 45°) to ensure a consistent safe outlet temperature, preventing accidental injuries and burns. TMV’s also play a crucial role in the delivery of hot water at safe temperatures to help fight off the harmful effects of Legionella bacteria growth. 

Australian Standards (AS4032.3) provide the legislation that ensures TMV’s be tested every 12 months as a minimum requirement with some requiring testing every 6 months.  The replacement of the thermostat and o- rings are required every 5 years.  

Malfunctions TMV’s have resulted in death and serious scalding and are the result of inadequate instillation, commissioning, operation, service and maintenance. The Australian Standards AS3498 and AS4032 detail the regulatory requirements and obligations to ensure compliance. 

By engaging TMV Testing you are assured that your compliance obligations are satisfied but more importantly your facility is safe! 


Backflow prevention

Backflow is where contaminated water flows back into the clean water supply.  To prevent backflow, Reduced Pressure Zone (RPZ) devices are installed to ensure the flow of water remains in the desired direction and protects the potable water supply from contamination.  

 RPZ Valves are used in high-risk situations where there is a significant threat of backflow because they provide a high level of protection. RPZD’s have a specialised valve assembly that has two check valves and a pressure relief valve. It’s designed to create a zone of reduced pressure between the two check valves, which prevents the backflow of contaminated water into the clean water supply. 

 RPZD’s require regular testing to ensure the device is operating correctly and safely at your facility. Australian Standard AS3500 outlines the frequency of testing is dependent on your devices and type of facility– we can assist you with this if required. TMV Testing is fully qualified to test all your backflow valves to ensure the safety of your water supply. 

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Legionella Control for warm water systems

Legionella testing is important to ensure the safety of warm water systems in buildings and facilities. 

Legionella bacteria multiply between 20°C and 50°C. Inadequate temperature control, stagnant water, biofilm formation and poor management practices can lead to the growth of Legionella.  

Your water management plan and regular testing can mitigate the risks for your facility and Australian Standard AS3666.3:2011 outlines prevention strategies and testing requirements.  

We can conduct the sampling and work with your team to develop a management plan. We submit the samples, provide analysis and work with you to interpret the results and reduce the risk. 

Adding legionella to TMV testing is good practice to ensure comprehensive water system safety. 

Can we help with solutions for your servicing needs?