Drayton TRV4 Classic Thermostatic Radiator Valve - White

It is the highest rating given by the European valve manufacturers association, indicating superior accuracy and energy saving performance.

Yes, every TRV4 Classic set includes both the thermostat head and a matching lockshield valve.

The TRV4 head is compatible with other TRV4 series bodies, but it is best practice to replace the valve body and head together for optimal performance.

It is designed for standard 15mm pipework found in most domestic central heating systems.

The exterior can be wiped with a damp cloth; no internal cleaning is required, though you should exercise the valve during summer.

It means the valve can be installed on either the flow or return side of the radiator without affecting the valve's performance or causing noise.

The valve pin may be stuck due to inactivity. Remove the head and gently press the metal pin; if it does not spring back, use a small tool to loosen it.

Tighten the gland nut slightly using a spanner. If the leak persists, the double gland seals may require replacement or professional attention.

This often indicates the flow is in the wrong direction for the valve body. Verify the flow direction and reverse the valve if necessary.