Thanks for the reply. Ok. I guess you mean the hot water tank. It's just a couple of wires on the top and a wiring box I guess and the pipe out of the top of the tank is I think the water supply from the back boiler
hi. Having changed a radiator I now have no hot water. I turned off the water supply to the radiators before draining and changing the rad. After changing I turned the water supply back on and bled the rads of air. They get lovely and hot only now the hot water is cold. The back boiler fires up...