What is the difference between TMV2 and TMV3?
TMV2 covers domestic and general applications, while TMV3 applies to higher-risk healthcare settings such as hospitals and care homes, where stricter performance and testing requirements apply.
TMV2 / TMV3 scheme
Thermostatic Mixing Valve Commissioning Certificate (TMV2 / TMV3)
A thermostatic mixing valve commissioning certificate records that a TMV has been installed, set and tested to deliver water at a safe blended temperature. TMVs are used to prevent scalding at outlets such as baths, basins and showers.
The TMV2 scheme covers domestic settings while the TMV3 scheme applies to higher-risk healthcare environments such as hospitals and care homes. Both require the valve to be commissioned and periodically checked to confirm it still delivers a safe temperature and fails safe.
TradePlanr lets you record the blended temperature, fail-safe test and valve details on site and produce a PDF commissioning certificate, so scald-prevention checks are documented cleanly.
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What it covers
- Property and outlet location plus TMV make, model and scheme (TMV2 or TMV3)
- Hot and cold supply temperatures at the valve
- Set blended outlet temperature against the required value
- Cold water supply fail-safe shut-off test result
- Flow rate at the outlet where required
- Confirmation the valve is suitable for the intended application
- Commissioning engineer details and dated sign-off
When it's required
A TMV commissioning certificate is completed when a thermostatic mixing valve is installed to control the temperature at an outlet and prevent scalding. In healthcare settings, TMV3 valves and stricter checks apply.
TMVs also need periodic checks after installation, because performance can drift over time. A common approach is an initial check within the first few weeks and then routine servicing to confirm the temperature and fail-safe operation.
The certificate provides evidence of safe commissioning, which is important for landlords, care providers and healthcare estates managing scald risk to vulnerable users.
How to issue it in TradePlanr
- 1
Enter valve and location details
Record the outlet location, the TMV make and model and whether it is a TMV2 or TMV3 application, so the certificate matches the installed valve.
- 2
Record supply and blended temperatures
Log the hot and cold supply temperatures and the set blended outlet temperature, checking it against the required value for the application.
- 3
Test the fail-safe shut-off
Carry out the cold supply fail-safe test and record the result, confirming the valve shuts off hot water if the cold supply fails.
- 4
Sign and store the PDF
Capture the signature, generate the PDF commissioning certificate and store it against the job, ready to hand over or add to a maintenance record.
Frequently asked questions
How often should a TMV be serviced?
A common approach is an initial check within the first few weeks of installation, followed by routine servicing at regular intervals to confirm the blended temperature and fail-safe operation. Healthcare settings often follow a defined maintenance schedule.
Why do TMVs need commissioning?
Commissioning confirms the valve delivers water at a safe blended temperature and fails safe if the cold supply is lost, which is essential to prevent scalding at the outlet.
Can I complete the certificate on site?
Yes. TradePlanr lets you record the temperatures and fail-safe test, capture the signature and produce the PDF at the property.
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