LavaTherm Thermostatic Radiator Valve TRV - 15 mm Straight - Energy Saving Central Heating Radiator Valve - Premium Brass Replacement TRV and Lockshield - Black

Upgrade your home heating with the LavaTherm Radiator Valve Twin Pack - a complete TRV + Lockshield valve set, ready for installation on standard 15 mm UK central-heating systems.Each radiator needs two valves: one to control hot water entering the radiator (the TRV), and another to control water leaving the radiator (the Lockshield). This pack provides both, making installation simple and complete. The thermostatic radiator valve (TRV) automatically adjusts water flow into the radiator depending on room temperature - so when a room warms up, the TRV restricts flow; if it cools down, the valve allows more hot water in. This delivers consistent, comfortable heating without manual adjustments. The Lockshield valve - often ignored, but essential - balances the heating system by regulating return flow. This ensures all radiators, even those far from the boiler, get a proper share of hot water so that every room heats evenly and efficiently. Because this twin pack is compatible with standar