Is a nervy time when filling up, my dad has got the best attitude, just goes for it and doesn't give a sh*t, doesn't check until up to pressure. Guess that's how you get when you've been doing it a long time.
when a gate valve on the cold feed or stopcock doesn't quite shut of and you open the downstairs tap to take the water away while you work upstairs and the customer turns it back of when you've cut the pipe and all of a sudden got water coming out where you don't want it upstairs.
i know the answere is to change the stopcock/gate valve but on the smaller job it's hardly worth it when it lets by only a little, I kno someone will disagree with that.