A thermostatic mixing valve (TMV) blends hot and cold water to deliver it at a safe, stable temperature, protecting vulnerable people from scalding while still keeping stored hot water hot enough to control bacteria. Where TMVs are installed, they must be serviced and tested every 12 months by a licensed plumber under AS 4032.3. Fenech Plumbing & Gas installs, services, repairs and annually tests TMVs and tempering valves, and provides certificates for your compliance records.
Hot water is stored at 60°C or higher to kill Legionella, but water that hot scalds in seconds. A TMV mixes it down to a safe delivery temperature (typically 45°C in healthcare and aged care, 50°C in most other buildings) at the tap. Over time the valve's thermostatic element drifts, so it must be checked, cleaned and recalibrated annually to keep delivering safe water.
TMV testing pairs with our strata plumbing and commercial maintenance programs, and with backflow testing, so we can cover all of a building's annual compliance in one schedule.
Tell us about your building and how many valves need testing, and we'll schedule the service, supply the certificates, and set an annual reminder.
Thermostatic mixing valves must be tested and serviced every 12 months by a licensed person under AS 4032.3. Annual testing confirms the valve still delivers water at a safe, stable temperature and protects against scalding.
TMVs are mandatory wherever vulnerable people may use the hot water, including hospitals, aged care, childcare, schools and many healthcare and disability facilities. They are increasingly fitted in strata and commercial buildings to control scald risk.
Yes. After each annual test we supply a compliance certificate recording the valve, the measured temperature and the test date, which you keep for your building's compliance records and audits.
We inspect and clean the valve, replace worn components as needed, recommission it and verify the outlet temperature against the standard. If a valve cannot be brought back into tolerance we recommend repair or replacement and re-test.
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