"peter attwood" wrote in message
. ..
Thanks for the suggestion, everything is obvious isn't it when someone
tells
you. Slight problem, stopcock feeding hot water cylinder is stuck, looks
very old and not used in years. Not sure what will happen if I apply some
force to it ,to try and free it.

Try 'closing' it a bit more first. You may be able to get some movement
going that way. Whenever I open a stopcock etc, I always fully open them
and then turn back 1/2 a turn. It doesn't affect the flow to any noticeable
degree but gives you this option if things get stuck.


I assume I can achieve the same by emptying
the cold water tank in the loft which feeds the cylinder, and either turn
off the mains, or tie up the ballvalve on the tank to stop it filling.

Yes same effect, or bung up the outlet hole from the header tank with
something suitable. I carry a Demi John bung in my kit for just this
purpose.

HTH

John