Your Trusted Partner for TMV Servicing
If you’re here, there’s a good chance your TMVs are due for servicing. Maybe you’ve had temperature failures, compliance concerns, or a risk assessment recommending routine checks.
You’re in the right place. At Titan Water, we carry out professional TMV servicing, testing, and calibration for all types of buildings, from healthcare and education to commercial and industrial settings. Our engineers ensure your thermostatic mixing valves are working safely, efficiently, and in line with the latest HSG274 Part 2 and NHS Model Engineering Specification guidelines.
Our approach is straightforward and thorough. We test each TMV for temperature accuracy, response time, and correct failsafe operation. If adjustments or internal cleaning are needed, we sort it there and then. You’ll receive clear records and practical recommendations - not just tick-box paperwork. Whether you need annual servicing or a full site-wide audit, Titan Water will keep your TMVs delivering safe, reliable hot water.
Nationwide Service
Reliable Expertise Wherever You Are
Our experienced management team operate from the Titan head office near Liverpool, but while our roots are in the North West, our reach goes far beyond it. Our engineers carry out TMV servicing & replacement projects across the UK through a network of trained regional specialists. Whether it’s a hospital in Cumbria, a care home in Birmingham, or a school in South Wales, we’ve been there - and we know how important reliable TMV performance is for user safety.
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If you’ve had scalding incidents, temperature failures, or just want confidence that your valves are working correctly, the team at Titan are always happy to help with clear, honest advice.
What Is TMV Servicing?
TMV servicing is the process of testing, cleaning, and recalibrating thermostatic mixing valves to ensure they deliver safe, predictable hot water. TMVs blend hot and cold water to a safe temperature at taps, showers, and outlets - protecting users from scalding while reducing Legionella risk.
A full service includes temperature testing, internal cleaning, descaling, adjustment, and failsafe checks. It ensures the valve reacts quickly to temperature fluctuations and closes safely if the cold supply fails.
Key objectives:
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Maintain safe delivery temperatures, especially for vulnerable users.
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Ensure rapid failsafe operation to prevent scalding.
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Comply with HSG274, NHS MES, and risk assessment recommendations.
How Often Should TMVs Be Serviced?
Most TMVs require annual servicing, although higher-risk environments such as hospitals, care homes, and nurseries may require more frequent checks.
You should arrange servicing if:
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Outlets exceed safe temperature limits.
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Users report fluctuating or inconsistent temperatures.
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The valve has become stiff, slow to react, or blocked with scale.
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A Legionella risk assessment recommends routine maintenance.
Regular servicing helps prevent scalding incidents, keeps you compliant, and improves user safety across your building.
What’s Involved in the TMV Servicing Process?
A professional TMV service includes:
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Temperature testing – Checking outlet temperatures before and after servicing.
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Internal cleaning and descaling – Removing debris, scale, and biofilm from internal mechanisms.
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Replacement of worn components – Cartridges, strainers, or seals if necessary.
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Recalibration – Adjusting the valve to achieve the correct blended temperature.
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Failsafe verification – Ensuring the valve reacts correctly if hot or cold feed fails.
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Record keeping and certification – Documenting all results for compliance and auditing.
Most servicing is completed with minimal disruption, and immediate repairs can usually be carried out on the spot.
What Is the Difference Between TMV Failsafe Testing and TMV Servicing?
TMV failsafe testing and TMV servicing are closely related, but they are not the same thing. TMV failsafe testing is a specific safety check that confirms the valve shuts down correctly if the cold-water supply fails. This prevents scalding and is one of the most important compliance requirements under HSG274 and NHS engineering standards.
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TMV servicing, on the other hand, is a full maintenance process. It includes temperature testing, internal cleaning, descaling, lubrication, cartridge checks, and recalibration. Servicing ensures the valve operates smoothly, blends water accurately, and reacts quickly to changes in supply conditions.
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In simple terms:
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TMV failsafe testing checks one critical safety function.
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TMV servicing is a complete health check and tune-up of the valve.
Proper TMV servicing will always include failsafe testing, but failsafe testing alone does not replace the need for routine servicing. Carrying out both ensures the valve protects users, delivers stable temperatures, and remains fully compliant.
Explore Our Full Range of Services
Case Studies
Want to learn more about the kind of work we do? Well you're in luck, as our 'Case Studies' pages are the perfect way to explore some of the 700+ projects we deliver every year, offering a glimpse into the challenges we've faced and the innovative strategies our team have employed to deliver excellence for our customers.
Our Clients
Appointed on our reputation, retained on our results!
With over 75 years of water management experience, Team Titan have become trusted partners to some of the UK's leading corporate brands.
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