At TMV Testing, we provide professional testing and servicing for Thermostatic Mixing Valves (TMVs) to ensure water temperature safety, prevent scalding, and maintain compliance with health regulations.

Regular TMV testing is essential for healthcare facilities, schools, care homes, hotels, and commercial buildings, where water temperature control is critical for safety and hygiene.

Our certified engineers conduct thorough testing, adjustments, and maintenance to ensure your TMVs are functioning properly, helping you avoid scalding risks, Legionella bacteria growth, and system failures.

If you’re looking for expert TMV testing across the UK, we are ready to assist.

Why is TMV Testing Important?

Regular TMV testing is crucial for preventing scalding incidents, as faulty valves can allow dangerously hot water to flow unchecked.

It also plays a key role in Legionella prevention, reducing the risk of bacterial growth in stored hot water systems.

Compliance with health and safety regulations is essential for hospitals, care homes, schools, and other public spaces, where water temperatures must be strictly controlled.

Routine testing also helps identify faults early, such as valve wear, incorrect temperature settings, or blockages, ensuring that TMVs continue to function correctly without unexpected failures.

What does TMV Testing Involve?

A comprehensive TMV testing service includes the following key checks to ensure optimal valve performance and safety compliance:

• Temperature check – Measures hot and mixed water temperatures at the outlet to confirm they remain within safe limits.
• Shut-off test – Simulates a cold water supply failure to ensure the TMV responds quickly and prevents scalding.
• Flow rate testing – Verifies that the TMV maintains consistent water pressure and temperature, preventing fluctuations.
• Cleaning and inspection – Checks for limescale buildup, debris, or faulty parts that could impact performance.
• Adjustment and calibration – Fine-tunes the TMV to ensure optimal temperature regulation and prevent unnecessary wear or malfunctions.

How much does TMV Testing Cost?

The average cost of TMV testing is £250 – £300.

The cost of TMV servicing varies based on location, quantity access difficulty and call-out or minimum charges.

How Often should TMVs be Tested?

TMVs should be tested every 6 months to ensure they remain fully operational and compliant with safety standards.

For commercial buildings, hotels, and gyms, annual testing is generally sufficient to maintain safe water temperature regulation.

Who Requires TMV Testing?

TMV testing is a legal requirement for facilities where water temperature control is critical for user safety, including:

• Hospitals and care homes – Adhere to strict TMV regulations to prevent scalding and bacterial contamination.
• Schools and nurseries – Protect children from extreme water temperatures.
• Hotels and gyms – Ensure compliance with water safety laws in high-usage environments.
• Commercial buildings – Maintain safe and regulated water systems in centralised hot water systems.
• Residential properties – Keep TMVs in bathrooms and kitchens functioning efficiently for safe temperature control.

Contact TMV Testing today to schedule a professional inspection and ensure your hot water system meets all safety requirements.

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Make sure you contact us today for a number of great TMV testing services.

For more information on TMV testing, fill in the contact form below to receive a free quote today.