Stored hot. Delivered safe. TMV servicing, testing and installation, nationwide.
We service, test, repair and install thermostatic mixing valves for care homes, schools, healthcare, landlords and businesses across the UK. Every valve gets checked properly, written up clearly and booked in for next time.
- TMV2 & TMV3 valves
- Tested in line with HTM 04-01
- Certificate for every valve
Measured, not guessed
Calibrated thermometers, readings recorded at every outlet.
Fail-safe tested
We isolate the cold supply and check the valve shuts down.
Paperwork that stands up
Certificates, logbook entries and an up-to-date asset register.
Never miss a due date
We schedule the next visit and remind you before it's due.
Everything your mixing valves need, from one team
A TMV is a small thing doing a big job. It sits between your hot supply and the tap, and it's the only thing stopping 60°C water reaching someone's skin. So it needs looking after.
TMV servicing & testing
Annual or six-monthly in-service tests, strip-downs and repairs.
- Temperature and fail-safe tests
- Strainers, check valves and descaling
- Recalibration and cartridge swaps
- Certificates and logbook entries
Installation & replacement
The right valve, fitted in the right place and commissioned properly.
- TMV2 or TMV3, matched to the site
- Retrofits on existing outlets
- Replacing worn or obsolete valves
- Commissioning records from day one
Asset registers & reminders
Know where every valve is, when it was last tested and when it's next due.
- Every valve tagged and logged
- Results kept against each valve
- Visits scheduled for you
- Reminders before tests fall due
Two risks, pulling in opposite directions
Hot water has to be stored hot to keep Legionella in check. But water that hot can scald in seconds. A TMV lets you have both: hot in the pipes, safe at the tap.
Cold stays cold
Cold water should be below 20°C. Between roughly 20°C and 45°C is where Legionella bacteria grow best.
Safe at the outlet
The TMV blends hot and cold to a set temperature, typically around 41°C for a shower and up to 44°C for a bath.
Hot stays hot
Stored hot water should be at least 60°C, which is well above the temperature that can cause a serious scald.
What actually happens on a TMV service
No mystery. Our engineer works through each valve in turn, writes down what they find, and tells you before doing anything that costs extra.
- Mixed outlet temperature measured and compared with the set point
- Cold supply isolated to prove the valve fails safe
- Strainers and check valves cleaned or replaced
- Limescale removed and the valve recalibrated where it's drifted
- Results recorded against that valve's entry in your register
| Valve | Location | Mixed | Status |
|---|---|---|---|
| TMV-01 | Ground floor assisted bath | 43.6°C | Pass |
| TMV-02 | Room 4 en-suite shower | 40.8°C | Pass |
| TMV-03 | Room 5 washbasin | 46.2°C | Recalibrate |
| TMV-04 | Staff WC basin | 42.1°C | Pass |
Illustrative only. Your register lists every valve on site with its full test history.
Anywhere vulnerable people use hot water
Care homes
Assisted baths, en-suites and basins where residents may not react to heat.
NHS & private healthcare
TMV3 valves tested to HTM 04-01 and recorded for your water safety group.
Schools & nurseries
Pupil washrooms and changing areas, serviced around the school calendar.
Social housing
Sheltered and supported housing, with records you can show a regulator.
Hotels
Guest showers and baths kept safe and comfortable, with minimal room downtime.
Offices
Washroom and shower valves that often get forgotten until something goes wrong.
Leisure
Busy changing-room showers that see heavy use and plenty of limescale.
The rules, without the jargon
TMVs in healthcare are covered by HTM 04-01. Valves themselves are made to standards such as BS EN 1111 and BS EN 1287, and certified under the TMV2 or TMV3 schemes. Your Legionella risk assessment, under ACOP L8 and HSG274, should say where you need them.
We'll explain which bits apply to your building, and make sure your records show the work's been done.
| Outlet | Typical maximum |
|---|---|
| Bidet | 38°C |
| Shower | 41°C |
| Washbasin | 41–43°C |
| Bath | 44°C |
Four steps, no fuss
Tell us about the site
Roughly how many valves, what kind of building and where. A quick call or the form is fine.
Get a fixed quote
We price per valve or per visit, so you know the cost up front.
We test and service
Every valve checked, cleaned and set up, with anything extra agreed with you first.
Records & reminders
Certificates, an updated register and a reminder when the next test is due.
Nationwide, with a soft spot for the South East
We look after TMVs right across the UK. Most of our work is in London and the Home Counties, so if you're in the South East we're rarely far away. Got sites in several regions? We can cover them all under one schedule.
- London
- Home Counties
- Surrey
- Kent
- Essex
- Hertfordshire
- Berkshire
- Buckinghamshire
- Sussex
- Hampshire
- Oxfordshire
- The Midlands
- The North
- The South West
- Wales
- Scotland
Latest advice
Commissioning a new TMV: what should happen on day one
A new TMV is only as good as the way it's set up. What should happen when a valve is commissioned, and the paperwork you should get afterwards.
Read the articleRepair or replace? When an old TMV has had its day
Most tired TMVs can be brought back with a service kit. Some can't. How to tell which is which, and what to think about before you replace.
Read the articleBringing TMVs back after a quiet spell or shutdown
Christmas closures, empty rooms and refurbs all leave valves sitting idle. What to check before people start using those outlets again.
Read the articleCommon questions
How often should a TMV be serviced?
At least once a year, and in many care and healthcare settings every six months. New valves should be checked soon after fitting, and the ongoing interval set from how stable the results are. Our compliance guide goes into more detail.
What's the difference between TMV2 and TMV3?
Both are certification schemes. TMV2 covers valves for domestic-type use. TMV3 covers valves for healthcare and care settings, with tougher performance requirements. If you look after vulnerable people, you'll usually want TMV3.
Do you only work in London?
No. We cover the whole of the UK and specialise in London and the Home Counties.
Will I get a certificate?
Yes. Every valve we test gets its results recorded, and you get a certificate and an updated asset register after each visit.
Got TMVs that need testing?
Tell us how many valves you've got and where. We'll come back with a clear, fixed quote.