Energy-Efficient Programmable TRV Valve Head - Adapter Included, Modern Design
Energy-Efficient Programmable TRV Valve Head. 28mm to 30mm Head Adapter for TRV 2-Way Thermostatic Radiator Valve. This adapter allows a 30mm current TRV 2-WAY head to be fitted onto a 28mm older TRV2WAY valve body.