Thermostatic Radiator Valves
Thermostatic radiator valves — commonly known as TRVs — automatically detect the room temperature and adjust the flow of hot water into the radiator to maintain a consistent level of warmth. When the room reaches the set temperature the TRV reduces the flow, saving energy without you needing to do anything manually. Available in straight, angled and corner configurations across chrome and matt black finishes, our TRV range covers the most commonly needed valve types for UK bathroom and home radiator installations. Browse below.
How Thermostatic Radiator Valves Work
A thermostatic radiator valve contains a sensor that responds to the air temperature in the room. When the room drops below the desired temperature setting, the TRV opens to allow more hot water into the radiator, increasing the heat output. When the room warms up to the set level, the TRV closes down to reduce the flow and prevent overheating. This automatic regulation means individual rooms can be kept at different temperatures without constant manual adjustment — improving comfort and reducing energy use throughout the home.
TRVs for Bathroom Towel Radiators
Thermostatic radiator valves are available in configurations specifically suited to bathroom towel rail installations — including angled TRVs for floor-mounted pipework, which is the most common setup in UK bathrooms. When fitting a TRV to a towel rail, always ensure the sensor head has adequate airflow around it — fitting the TRV in a position where it is covered by a towel or obstructed by the wall may affect its ability to read the room temperature accurately.
Manual vs Thermostatic — Is a TRV Always the Better Choice?
For most radiator installations, a thermostatic valve is the better long-term option — reducing energy consumption, improving comfort and removing the need for manual adjustment. The modest additional cost over a manual valve is typically recovered quickly through lower heating bills. The main exception is the radiator in the room that houses your room thermostat — fitting a TRV on that radiator can interfere with the thermostat’s operation. In that room, a manual valve is usually recommended instead.