SLightly shifting the thread, I was asked to put a stop tap at a convenient hieght for a pensioner, she wanted it at the front of her sink unit, just inside the door.
To cut a long story short, once I had turned off the shared supply in the back alley, leadlocked on to the lead pipe coming out of the floor behind the sink unit, run a new bit of pipe to a Hep2O stop tap.
Iwent next door to relight their combi, no water would come through!
I thought Id nackered the stop tap in the alley but discuvered water would flow through the new stop tap.
Further examination showed that the cold main raises in the first house to just behind the sink unit, then branches off and goes to next door.
How does that get sorted out?
Tim