My wife tried to bang a small nail into our kitchen wall last night in order to hang a clock only to find that there was a copper pipe buried in the wall. Is it common practice to bury pipes into a wall and then plaster them over so that its impossible to see that they are there ? I now have the water turned off and have exposed part of the pipe with the small hole. Fortunately, its not much more than a large pin *****. Removing any of the pipe from the wall will be an absolute nightmare as wall paper plaster and everything else will have to co off. Is there a way of repairing the pipe ? Thankyou for any helpful advice.