Thermostatic Mixer Valves (TMVs) are safety devices that blend hot and cold water to deliver a controlled outlet temperature. They’re commonly installed in environments like hospitals, schools, and care homes, where controlled water temperature is critical.

The key role of a thermostatic mixer valve is to prevent scalding by regulating water temperature at the point of use. If either hot or cold water supply fails, the valve automatically shuts off – avoiding dangerous temperature spikes. This makes TMVs an essential part of building safety, particularly for protecting vulnerable users.

Why is TMV Testing Needed?

Installing a TMV is not enough. Without regular TMV testing, there’s no guarantee it’s performing correctly. Over time, valves can become clogged with limescale or debris, and internal parts may degrade, causing water temperatures to fall outside safe ranges.

Inconsistent water temperature isn’t just a comfort issue – it can lead to scalding injuries or increase the risk of Legionella if water temperatures fall into the danger zone. That’s why testing and servicing TMVs should form part of your wider water hygiene strategy.

At Dantek, we provide specialist TMV testing services, carried out by trained technicians. Our service includes temperature checks, internal inspections, and full reporting – helping you stay compliant with safety standards.

Compliance and Legionella Control

TMVs are often required to meet regulatory guidelines, particularly in settings that follow HTM 04-01 standards. This includes regular servicing at least every six months, although the exact frequency may depend on manufacturer guidance and site-specific risks.

Beyond temperature control, TMVs also impact Legionella risk management. If water sits stagnant within the valve or if temperatures are not properly maintained, bacteria can grow. For this reason, TMVs should always be included in your Legionella risk assessment and monitored as part of your routine water hygiene controls.

Dantek Environmental offers a full range of services to support compliance – from risk assessments to planned preventative maintenance. Our technicians make sure your TMVs, and your wider water system, are safe and functioning properly.

Stay Safe and Compliant

TMVs are a small but vital part of water safety. Regular TMV testing helps prevent scalding, supports Legionella control, and ensures compliance with health and safety law.

If you’re responsible for maintaining safe water systems, Dantek can help. Our expert services cover TMV servicing, Legionella control, and ongoing monitoring, giving you peace of mind that your systems meet required standards.

Get in touch with Dantek to schedule your next service or speak to our team about a planned maintenance programme tailored to your site.