Chrome t tee piece dual fuel connector. Connects the heating element, radiator valves and heated towel rail / radiator together to create a dual fuel central heating and electric towel rail /
John Lewis Lunan Dual Fuel Heated Towel Rail and Valves, from the Wall
Towel Rail Dual Fuel Kit 600w PTC Element with Chrome T Piece - Heat & Things
What is a Dual Fuel Towel Rail & Why Do I Need One?
Milano Elizabeth - Anthracite Traditional Dual Fuel Heated Towel Rail - 930mm x 620mm - Choice of Wi-Fi
Your Bathroom Needs a Dual Fuel Towel Rail | Drench