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TMV Servicing and Testing
Unstable outlet temperature, poor flow or an overdue valve record calls for assessment. A change in room use or user vulnerability also matters. Identify the outlet and the circumstances of the complaint instead of assuming the whole hot-water system needs its temperature reduced.
Discuss your requirementsDefined services, clearly scoped.
Overview
Explain the desired outcome as well as the immediate symptom. A repair enquiry, a change in building use and a planned renewal need different information and decisions. We use that brief to establish the relevant assessment and the boundaries of the proposed work.
What the work can include
Work covers identifying valves, reviewing installation and manufacturer requirements, servicing accessible components and carrying out the appropriate performance tests. Records identify the valve, outlet, observations, results and any repair or replacement needed. A programme distinguishes completed tests from valves that could not be accessed.
Important system decisions
A TMV blends hot and cold water to control the mixed outlet temperature. It does not replace the building's water-hygiene controls. The valve type and application must suit the assessed scalding risk, and the hot and cold supplies must support correct operation. Mixed outlet readings alone do not establish the condition of upstream distribution.
A temperature spot check is different from a complete service and the relevant functional tests. The instruction must state the required activities, including the manufacturer's test method. A valve that fails the applicable criteria needs a defined action and a decision about use of the affected outlet.
Assessment and preparation
Provide the valve register, outlet references, previous test results and water-risk assessment. Identify the types of users, access arrangements and the person responsible for restricting use where required. Include manufacturer information and any changes to supply conditions.
How the work proceeds
We establish the valve schedule and test scope, then carry out the agreed servicing and checks. Findings are linked to individual outlets so failed or inaccessible items receive specific follow-up. Handover records results, repairs and the next service requirements within the site's maintenance programme.
The instruction identifies what is included, the evidence expected at completion and how additional findings are authorised. Records remain connected to the equipment and location so the next person maintaining the system can understand what was done.
Cost, timing and disruption
Valve numbers, type, access, manufacturer requirements and replacement parts affect price. A grouped programme should identify all outlets and allowance for reattendance. Work planning covers temporary loss of washing facilities, especially where alternative facilities are limited.
Tell us about working hours, occupied areas and any activity that cannot continue during an interruption. Those constraints shape the sequence and access arrangements. Agree the finish, testing and handover requirements alongside the physical work so the quotation describes the complete job.
Sector applications
Offices need water services planned around occupation. Education needs access and interruptions coordinated with teaching. Healthcare and care requires the users and relevant specialist requirements to be understood. Hospitality needs washing facilities and operating demand considered together. Our full services and projects support all sectors, with the instruction based on each system's actual use.
Local coverage
We cover Northumberland, Tyne and Wear, County Durham and Tees Valley, including Berwick-upon-Tweed, Alnwick, Morpeth, Hexham, Newcastle, Gateshead, Sunderland, Durham, Darlington, Hartlepool, Stockton-on-Tees and Middlesbrough. View all locations.
For several sites, provide separate equipment records, access contacts and operating restrictions. A common programme still needs a clear instruction for each building.
Frequently asked questions
Is a TMV test the same as checking tap temperature?
No. A service and the relevant functional tests assess more than one outlet reading. Define the required work against the valve and its application.
Does fitting a TMV control legionella?
A TMV addresses mixed outlet temperature and scalding risk. The hot and cold water systems still need their own hygiene controls and monitoring.
Do all valves need the same servicing interval?
No single interval suits every valve and setting. Use manufacturer requirements, the application, risk assessment and previous results to establish the programme.
What should an estate valve register show?
Identify the valve, outlet, location, type, service results and outstanding actions. Record failed access so an untested item cannot disappear within a completed visit.
Knowledge and guidance
Read thermostatic mixing valves explained and explore the Knowledge Centre. Official technical guidance provides context for the assessment and arrangements relevant to this work.