Derry Bold - White Thermostatic Radiator Valve & Installation Kit Straight 15mm (130mm version)

A complete TRV set for more flexible room heating

Designed to combine individual radiator control with a coordinated finish, this White Derry Bold thermostatic valve set includes both the TRV and matching lockshield. Its straight layout suits the relevant pipe route, and the liquid sensing mechanism adjusts the valve as surrounding temperature changes.

Why choose these radiator valves?

• Take more control of individual room comfort: Thermostatic control lets this radiator react to the temperature of its own room rather than relying only on the main heating controls.
• Avoid heating a room more than you need: Restricting flow when less heat is needed can help prevent an already-comfortable room from continuing to receive unnecessary radiator heat.
• Add protection during very cold weather: Its frost-protection function can allow some flow at very low temperatures, helping reduce the risk of water freezing in the radiator and nearby pipework.
• Finish both sides of the radiator with one set: The set includes the TRV and matching lockshield together, giving you both radiator valves in one coordinated purchase.
• Choose a valve body that suits your pipe route: For side-entry radiators fed by pipework running along the wall, a straight valve provides a direct connection.
• Adjust the radiator to suit how you use the room: Several thermostatic settings give you more flexibility than a simple manual on/off valve.
• Get automatic temperature-responsive control: Room-temperature changes are detected by the liquid sensor, allowing the valve to regulate flow automatically.
• Choose a finish that complements the installation: A cleaner modern form helps the valve set feel coordinated with contemporary radiator designs. The White colour with a gloss finish gives the visible valve set a considered decorative appearance.
• Add longer-term confidence to the purchase: A 3 years guarantee gives you longer-term reassurance beyond the initial installation.

What's included

• Thermostatic radiator valve head with body
• Matching lockshield valve
• Decorator's cap
• Pair of pipe covers
• Bleed valve
• Blanking plug

Key technical details

• Connection Size Type: 1/2 BSP
• Fitting Type: Straight
• Connection: 15mm
• Control Type: Multi Temperature Control