TMV Servicing, Maintenance and Replacement

What is a Thermostatic Mixing Valve?

A Thermostatic Mixer Valve (TMV) blends hot and cold water to a pre-set, safe temperature, preventing scalding and maintaining consistent water flow. TMVs are crucial in environments like hospitals, nursing homes and schools, where vulnerable individuals are at risk. TMVs enhance safety and comfort, ensuring efficient temperature control in various settings, by automatically adjusting water temperature. 

How a Thermostatic Mixing Valve Works

A thermostatic mixing valve blends hot and cold water to a safe, consistent temperature using several mechanisms: 

• Water Mixing Mechanism
  The TMV connects to both hot and cold water supplies. Inside the valve, a thermostatic element adjusts the flow of hot and cold water based on temperature changes to maintain the desired output. 
• Temperature Control
  If the water is too hot, the element reduces the flow of hot water and increases cold water. If it’s too cold, it increases the flow of hot water while reducing the cold water supply. This balance ensures a stable temperature, even with fluctuating water supply. 
• Safety Shut-Off Feature
  One of the key safety features of a Thermostatic Mixer Valve is its automatic shut-off function. If either the hot or cold water supply fails, the TMV will instantly stop the water flow. This prevents hot water from coming through without being mixed with cold water, which could otherwise cause scalding. 
• Anti-Scald Protection
  The TMV’s pre-set temperature is capped at a safe maximum level, ensuring water remains within a safe range, even if the hot water supply becomes dangerously hot. This is especially important in environments with vulnerable individuals, such as children, the elderly, or those with disabilities. 

Who Needs Thermostatic Mixer Valve Servicing?

• Residential properties – Landlords, property managers and homeowners should ensure TMVs are properly maintained, especially in bathrooms and kitchens with single taps. This is crucial to prevent scalding, particularly for young children or elderly family members. 
• Commercial buildings – Commercial property owners and landlords must keep water systems compliant. TMVs also enhance the experience for customers, staff and visitors by providing a consistent water temperature for handwashing. 
• Hospitals and care homes – TMVs are essential in healthcare settings like hospitals, care homes and GP surgeries to protect patients and staff from dangerous temperature fluctuations. 
• Schools – Regular TMV maintenance is vital in schools and nurseries to safeguard children from the dangers of hot water.