On 7 Apr, 11:55, Lobster wrote:
wrote:
We have plumbed an additional chrome radiator in the bathroom from the
pipes of another under the floor. We have just noticed that they come
on when the shower is on and when the hot water is on! Can this be
right? We have a combi boiler that is usually on timed. Thought it
unusual that it would be on with the hot water and the heating - what
could have happened??

Haven't you (rather obviously) plumbed into the bathroom hot water
system instead of the central heating? Or am I missing the point somewhere?

David

That's the given, even if this is OK can it be right to be on both
systems and how could we have done this?