TMV servicing · Sydney
TMV servicing Sydney
Thermostatic mixing valve servicing, temperature testing, fault diagnosis and valve replacement for commercial, healthcare, aged care, education and strata premises across Sydney.
Valves are identified, tested, serviced and retested, with the delivered temperature recorded so you have a clear service history for each valve.
What a TMV does
Controlled heated-water temperature at the outlet
A thermostatic mixing valve blends stored hot water with cold water and holds the delivered temperature within a set range. Because it responds to changes in incoming temperature and pressure, it keeps the outlet temperature stable rather than letting it drift with whatever the hot water plant is doing.
TMVs are commonly used in higher-risk environments including healthcare, aged care, early-childhood facilities and schools to provide controlled heated-water temperatures and reduce scalding risk. They are serviceable devices, which is why their performance is tested and recorded rather than assumed.
NSW temperature control
45°C at personal-hygiene outlets in specified facilities
In specified higher-risk facilities, heated water at outlets used primarily for personal hygiene — such as basins, showers and baths — must be delivered at no more than 45°C through a compliant temperature-control device.
What that means in practice depends on the facility, the outlets and the existing installation. We look at what is actually installed and what the outlets are used for, rather than assuming a TMV is required at every basin in every building.
Servicing and testing
How a TMV service runs
- 01
Locate and list the valves
Every TMV on site is identified and recorded, along with the outlets it serves, so nothing is missed at the next service.
- 02
Test the delivered temperature
Outlet temperatures are measured and recorded so the valve's actual performance is known before anything is opened up.
- 03
Service or replace
The valve is serviced with the correct parts, or replaced where it can no longer hold a stable temperature.
- 04
Retest and record
Delivered temperature is retested after the service and the result is recorded for your file.
Scope of work
Servicing, testing and valve replacement
- Routine TMV servicing, including strip-down, clean and replacement of service parts
- Outlet temperature testing and recording
- Fault diagnosis where outlet temperatures are drifting or unstable
- Valve replacement where a TMV can no longer hold temperature reliably
- Servicing across multiple valves on one site, scheduled together
- Service records supplied for your compliance file
Fault signs
When a TMV needs attention
- Water at basins or showers running hotter or cooler than it should
- Temperature that swings while the outlet is running
- A noticeable drop in flow from a mixed outlet
- Complaints from staff, residents or patients about inconsistent water temperature
- A valve that has not been serviced or temperature tested on record
- Weeping or corroded valve bodies, unions or strainers
Not the same as a domestic tempering valve
Houses and units are a different job
A domestic tempering valve on a house or unit hot water system is a simpler device with a different purpose, and it is covered with the rest of our hot water work.
Domestic tempering valves and hot water systemsRelated services
Compliance, hot water and maintenance
Frequently asked questions
TMV questions
What does a thermostatic mixing valve actually do?
It blends stored hot water with cold water and holds the delivered temperature within a set range, so the outlet temperature stays controlled even when incoming pressures or temperatures shift.
Which buildings use TMVs?
TMVs are commonly used in higher-risk environments including healthcare, aged care, early-childhood facilities and schools to provide controlled heated-water temperatures and reduce scalding risk. Whether a particular installation needs one depends on the facility and how the outlets are used.
What temperature should personal-hygiene outlets deliver?
In specified higher-risk facilities, heated water at outlets used primarily for personal hygiene — such as basins, showers and baths — must be delivered at no more than 45°C through a compliant temperature-control device.
Is a TMV the same as the tempering valve on my house?
No. A domestic tempering valve is a simpler device used on ordinary residential hot water installations, and that work is covered on our Hot Water page. A TMV is a serviceable, temperature-tested valve used in higher-risk settings.
How do I know if a TMV needs replacing rather than servicing?
If the valve cannot hold a stable delivered temperature after being serviced with the correct parts, or the body and internals are past their serviceable condition, replacement is the honest answer and we say so.