How Much Space Does a Dual-Fuel T-Piece Need?
Quick answer
Measure the complete assembly below and beside the radiator. Include the T-piece, heating element controller, valve, cable and the space needed to install and service them.
Measure from the finished floor
Record the distance from the radiator port to the finished floor or any shelf below it. Use the component drawings to establish the installed depth of the parts below the rail. Threaded sections can overlap when assembled, so ask the installer to check the overall stack against the drawings.
Check the route to the pipework
Measure sideways from the T-piece branch and check where the valve will meet the supply or return pipe. Measure the existing pipe centres and note whether the pipes come from the wall or floor. Include any skirting, boxing or tile trim that could restrict access.
Leave access around the controls
Check that the valve can be operated and the controller can be seen and reached. Ask your installer to confirm the cable route and any space needed to fit or remove the element. Use the exact product dimensions when comparing black and chrome fittings.
See the dual-fuel T-piece buying guide for the other fit checks and both finishes.


