TMV servicing & in-service testing
Temperature checks, fail-safe tests, strainers and check valves, descaling and recalibration. Written up valve by valve.
- Intervals set the HTM 04-01 way
- Hard-water descaling as standard
- Certificates and logbooks
Thermostatic mixing valves · London only
London's TMVs, tested and tamed.
We service, test, descale and replace thermostatic mixing valves in London buildings, from a single HMO to a big care home with a valve on every bath and basin. Chiswick-based engineers, all 32 boroughs plus the City, and a certificate for every valve we touch.
- W4
- SW1
- EC2
- E14
- N1
- SE1
- NW3
- CR0
- TW9
- UB8
- IG1
- + the rest
What we do
Everything a TMV needs, from first fit to fiftieth service.
A TMV sits quietly behind a panel doing one job: stopping someone getting scalded. It only keeps doing that job if somebody checks it. That's us.
Installation & replacement
New TMV2 and TMV3 valves, swaps for tired or obsolete ones, and fixes for valves fitted in places no hand can reach.
- Right valve for the right outlet
- Commissioned and recorded on day one
- Access panels where there weren't any
Compliance, explained
HTM 04-01, BS EN 1111 and 1287, TMV2 and TMV3, and how they tie in with your Legionella control under ACOP L8 and HSG274.
- Plain-English guide
- Outlet temperature guidance
- What inspectors tend to ask for
Asset registers & scheduling
Every valve listed, located, labelled and on a timetable, so nobody has to remember which flat had the sticky one.
- Room-by-room TMV register
- Service dates planned ahead
- Ready to share with auditors
Working in London
We know what a London job actually involves.
The valve's the easy bit. Getting to it, parking near it and doing it without upsetting 80 residents is where local experience pays off.
Hard London water
London's water is famously hard, and limescale is a TMV's worst enemy. It clogs strainers, slows the thermostat and sticks check valves. We descale every time and tell you honestly if your interval needs to be shorter.
Parking and permits
Controlled parking zones, red routes, loading bays shared with three restaurants. We plan parking before we turn up, so you're not paying for an engineer to circle the block.
Access in occupied buildings
Flats, wards, guest rooms, classrooms. We work from your access plan, give residents notice letters if you want them, and come back for the ones we couldn't get into.
Out-of-hours when it suits
Early starts in offices, evenings in clinics, school holidays for schools. We can book work around when your building is quietest.
Who we work for
From one-bed HMOs to hospital wings.
Anywhere vulnerable people use hot water, there's usually a TMV, and someone responsible for keeping it safe. These are the kinds of London buildings we work in.
HMOs & private lets
Shared bathrooms, high turnover and a licence to keep. Quick visits, clear paperwork.
Mansion blocks & flats
Valves under baths, behind tiles and in airing cupboards. We're used to it.
Social housing & housing associations
Sheltered and supported schemes, estates and street properties across whole portfolios.
Care homes
TMV3 valves, frail residents and records your registered manager can show an inspector.
NHS trusts & private clinics
Servicing that follows HTM 04-01 and fits around clinical sessions.
Schools & nurseries
Little hands, lots of basins. We do the bulk of it in the holidays.
Hotels & serviced apartments
Room-by-room servicing that works with housekeeping, not against it.
Offices & leisure centres
Busy showers, accessible toilets and changing places. Serviced before the morning rush.
Areas we cover
Every London borough. Nowhere else.
We're based in Chiswick and we only work in London. All 32 boroughs and the City of London, grouped into five patches so our engineers spend their time on valves rather than the North Circular.
Pick a tile to see what we typically find in that part of town: the housing stock, the building types and the postcodes we cover.
How it works
Four steps, no surprises.
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Tell us what you've got
Building type, rough valve count, postcode. If you don't know how many TMVs you have, that's fine. Lots of people don't.
-
Fixed quote and a plan
We price it, then agree access, parking and timing. Notice letters for residents too, if you want them.
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We service every valve
Tested, cleaned, descaled, set and fail-safe checked. Anything we can't fix there and then gets flagged with a price.
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Records you can use
Certificates, logbook entries and an updated asset register, plus the date your next service is due.
From the blog
Notes from London plant rooms.
Practical bits on TMVs, London buildings and keeping hot water safe.
SEP 2026REGISTERS
Building a TMV asset register for a London property portfolio
Nobody can service valves they don't know about. A practical guide to finding, recording and scheduling every TMV across a London portfolio, and keeping the list honest.
Read the post JUN 2026LEISURELeisure centres and gym showers: keeping busy TMVs in check over summer
Changing rooms run hot water all day, and summer adds warm mains water and school holiday crowds. How to keep leisure centre and gym TMVs safe and steady.
Read the post MAR 2026FLATSMansion blocks and high-rises: TMVs and communal hot water in London
From Edwardian mansion blocks to glass towers by the docks, London's flats share hot water in ways that change how TMVs behave. What to know and what to check.
Read the postLet's get your TMVs tested, tuned and on record.
Tell us where you are in London and roughly how many valves you've got. We'll come back with a fixed quote and a visit plan that suits your building.