At TMV Water Testing, we ensure your thermostatic mixing valves are both safe and fully compliant with UK regulations.

We carry out accurate water temperature assessments to confirm that TMVs in hospitals, care homes, schools, and residential properties across the UK are performing reliably and safely.

Our TMV Water Testing service is designed to minimise the risk of scalding and Legionella, while maintaining clear records and accurate calibration for full compliance and peace of mind.

Our efficient, professional approach reduces disruption and protects users, especially those most at risk.

Why is TMV Water Testing Important?

TMV water testing helps prevent scald injuries, supports Legionella control, and ensures adherence to water safety regulations.

Accurate temperature regulation is essential in healthcare, education, and hospitality environments where the safety and wellbeing of occupants are a legal and operational priority.

What are the Risks of Poor TMV Performance?

Inadequate TMV performance during water testing can lead to serious health, legal, and operational issues, such as:

• Scalding risks – Excessively hot water may burn users, especially vulnerable groups.
• Legionella growth – Cool or stagnant water can support bacterial development.
• Valve leaks or failures – May result in water damage and repair costs.
• Non-compliance – Failing to meet health and safety regulations can lead to failed inspections.
• Legal liability – Poor safety measures can result in penalties or legal claims.
• Reputational harm – Unsafe facilities can damage your organisation’s credibility.
• Service disruption – Faulty TMVs may interrupt hot water access during key times.

How much does TMV Water Testing Cost?

The cost to carry out water testing of thermostatic mixing valves (TMVs) typically ranges between £200-£300.

Prices for TMV testing vary based on the number of valves, system accessibility, and whether Legionella or laboratory analysis is required. Additional costs may apply for older systems, emergency call-outs, or remote locations.

At TMV Water Testing, we offer clear, fixed pricing for TMV testing tailored to your site and compliance needs.

What does TMV Water Testing Involve?

TMV water testing begins with measuring outlet temperature to ensure it falls within safe operational limits.

Failsafe mechanisms are tested to confirm that the valve shuts off properly if the hot or cold supply fails. The system is also checked for signs of scale, corrosion, or debris that may hinder performance.

All results are logged, including temperature readings and test intervals. Any valves that fall outside specification are recalibrated where possible or referred for servicing if required.

How Often should TMV Water Testing be Carried Out?

TMV water testing should be conducted every six months in healthcare and care environments. For residential and commercial buildings, annual testing is usually sufficient.

In areas with hard water or heavy system use, more frequent testing may be recommended based on risk assessments. Scheduled testing ensures compliance, safety, and operational reliability.

Is TMV Water Testing Required by Law?

TMV water testing is required by law in many UK settings to ensure water safety and prevent scalding or Legionella risks. Regular testing confirms valves operate within safe temperature limits and meet health and safety standards.

Under HSG274 Part 2, the Health and Safety Executive (HSE) requires routine TMV testing and monitoring as part of a Legionella control programme. In healthcare and care environments, HTM 04-01 makes TMV testing mandatory every six months to protect vulnerable users.

Building Regulations Part G also require TMVs to be fitted and maintained on baths in new-build and refurbished homes, ensuring outlet temperatures do not exceed 48°C.

Failing to carry out regular TMV water testing can lead to non-compliance, fines, or health risks.

Where is TMV Water Testing Required?

TMV water testing is required or strongly advised in settings where water safety is critical, including:

• Hospitals – To protect patients and maintain hygiene standards.
• Care homes – For the safety and comfort of elderly or vulnerable residents.
• Schools and nurseries – Preventing hot water-related injuries for children and staff.
• Residential buildings housing vulnerable individuals – Meeting tenant safety obligations.
• Hotels and hospitality venues – Ensuring guest safety in showers and bathrooms.
• Gyms and leisure centres – Managing temperature in high-traffic shower areas.
• Commercial buildings – Meeting health and safety requirements for employees and visitors.
• Landlord-managed properties – Fulfilling legal responsibilities for rental accommodation.

Can TMV Water Testing be Combined with Servicing?

Combining TMV water testing with servicing in a single visit maximises efficiency and ensures full valve functionality.

While testing confirms temperature accuracy and failsafe operation, servicing addresses internal cleaning, scale removal, and mechanical integrity. Bundling both services reduces disruption, improves system reliability, and delivers full compliance in fewer visits.

Contact TMV Water Testing to learn more about combined service and testing packages.

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