At TMV Annual Service, we help ensure the ongoing safety and performance of your thermostatic mixing valves across healthcare, hospitality, and residential properties throughout the UK.

Our experienced team ensures that your TMVs consistently deliver water at safe, stable temperatures. This minimises scald risks and supports compliance.

Each annual visit includes full inspections, precise calibration, and detailed performance checks to give you total confidence in your hot water systems.

Having a routine TMV annual service helps avoid breakdowns, supports health and safety standards, and offers year-round protection for everyone using your facilities.

Why is a TMV Annual Service Important?

A TMV annual service ensures your valves blend hot and cold water to a safe, regulated temperature. This significantly reduces the risk of burns for vulnerable users.

Over time, mineral deposits and mechanical wear can cause the valve to drift or fail. An annual thermostatic mixing valve service ensures accurate temperature control, confirms fail-safe function, and upholds compliance with legal and care-related regulations.

What are the Risks of Not Servicing a TMV?

Skipping your TMV annual service can result in serious risks, such as:

• Scalding hazards – Water that’s too hot may cause burns, especially for vulnerable users.
• Legionella risk – Inconsistent or incorrect water temperatures can support bacterial growth.
• Valve failure – Lack of maintenance may cause the valve to stop mixing correctly or fail altogether.
• Regulatory non-compliance – Failure to meet health and safety standards could result in penalties.
• Reduced performance – Scale and debris buildup impacts water flow and temperature accuracy.
• Unexpected downtime – Malfunctioning valves may disrupt water supply during critical times.

How much does an Annual TMV Service Cost?

An annual TMV service costs between £200 – £300.

The exact cost of TMV servicing depends on valve number, site complexity, accessibility, and whether parts or repairs are needed.

Contact our team to receive a tailored quote for your system.

What is Included in a TMV Annual Service?

A TMV annual service begins with a thorough visual check for leaks, wear, and corrosion. Filters and strainers are cleaned to remove scale and debris.

Our team test and reset the temperature to ensure it meets legal and manufacturer requirements. A failsafe check confirms that the valve shuts off if one water supply fails.

All results are documented for compliance, and we’ll advise if further repairs or replacements are needed.

Are TMV Annual Services Legally Required?

Annual TMV servicing is legally required in many UK environments to maintain safe water temperatures and comply with national health and safety regulations. Regular servicing ensures valves prevent scalding, control Legionella risk, and meet performance standards.

• Building Regulations Part G – These regulations require TMVs to be installed and maintained on baths in all new-build and refurbished homes to keep outlet temperatures below 48°C.
• Health and Safety Executive (HSE) – HSG274 Part 2 – HSE guidance mandates regular TMV inspection, cleaning, and testing as part of a Legionella risk management plan. Neglecting this duty can breach health and safety law.
• NHS Guidance – HTM 04-01 – In healthcare settings, TMV servicing is compulsory every six months to ensure outlet temperatures stay within the safe range of 41–44°C.
• Care Quality Commission (CQC) Compliance – Care homes and medical facilities must demonstrate regular TMV servicing and maintain records for inspection.
• Health and Safety at Work Act 1974 – Duty holders are legally responsible for managing water system risks, including maintaining TMVs in safe working order.

Where are TMVs Installed?

Thermostatic Mixing Valves are essential in environments where hot water safety is a priority, including:

• Hospitals – Safeguarding patients with controlled water temperatures.
• Care homes – Protecting elderly and vulnerable residents during bathing and handwashing.
• Schools – Providing safe water access for students and staff.
• Commercial kitchens – Reducing hot water injury risks while maintaining hygiene.
• Residential rental properties – Supporting landlord compliance and tenant safety.
• Public washrooms – Preventing unsafe temperature fluctuations in shared spaces.
• Leisure centres and gyms – Ensuring safe, warm water in showers and changing areas.

How Long does a TMV Annual Service Take?

TMV annual services typically take between 30 and 60 minutes per valve, depending on the valve’s condition and accessibility.

Most thermostatic mixing valves can be serviced in a single visit, limiting disruption to your operations. If repairs or part replacements are needed, we’ll advise and carry out additional work upon your approval to restore full functionality.

Contact TMV Annual Service for details on annual valve maintenance that minimises disruption to building residents.

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

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