Derry Bold - Polished Brass Thermostatic Radiator Valve & Lockshield Straight 15mm

Control radiator warmth with greater precision

Designed to combine individual radiator control with a coordinated finish, this Polished Brass 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?

• Set each room's warmth more independently: The thermostatic head responds to room temperature and regulates hot-water flow through that radiator as the selected comfort level is reached.
• Reduce unnecessary radiator heating: Automatic flow reduction helps avoid continuing to heat an individual room at full radiator output after it has reached the chosen comfort level.
• Keep a layer of frost protection in reserve: The frost setting provides a safeguard for very cold conditions by allowing the valve to open slightly when temperatures fall sufficiently low.
• Finish both sides of the radiator with one set: Both the thermostatic side and matching lockshield are included, simplifying the parts you need to source for the radiator.
• Plan the radiator connection with the right valve shape: For side-entry radiators fed by pipework running along the wall, a straight valve provides a direct connection.
• Set the radiator to a more suitable comfort level: Several thermostatic settings give you more flexibility than a simple manual on/off valve.
• Use a sensor that reacts as the room warms and cools: The liquid sensor responds to changes in surrounding temperature to operate the thermostatic mechanism automatically.
• Coordinate the valves with the radiator: Its modern profile gives the radiator connection a neater, more streamlined finishing detail. The polished & un-lacquered Polished Brass finish helps coordinate the valves with the radiator and nearby fittings.
• 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

Key technical details

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