I need to turn off the hot water to fix a tap, but I just can't turn the stop tap. This is on a pipe behind the hot water cylinder running up to the loft and it's got a flat oval shaped piece to turn. I've found it tight in the past and have use mole grips, but this time I can't budge it.
Am I likely to damage anything if I really get brutal, or is there any way of freeing it up? Alternatively, I presume I can turn off the cold water feed to the house and drain the tanks. (In the long term, I think I'm going to have to replace this tap.)
Peter.