Eastbrook Straight Thermostatic Radiator Valves TRV - Brushed Brass - Inc Lockshield. Lockshield Valve Brushed Brass. Eastbrook 15mm Straight TRV. The numbers on the TRV heads do not represent specific room temperatures as the temperature at which the valve operates depends on the water temperature flowing through the radiator, airflow around the head of the TRV, the room size and any heat loss in that space through walls, windows and floors.
