Thanks - yes, just the hot water, the cold (also coming from the tanks) is fine.
The pump isn't connected directly to the cylinder, it's on the hot water feed to the bath, so yes I guess it's just a tee off.
Hi there - in desperate need of some help on this one!
I have a fairly conventional hot water / heating setup in my flat in a block. I'm on the top (3rd) floor and I've got header tanks (which feed all the flats) which gives me pressure for the hot water cylinder, which is heated by the...