Yesterday I found a fairly large hole in the end of a pipe I believe is lead that is used for overflow for water coming from a bathroom sink. The house if about 90 years old and I really don't want to have to replace this pipe. Is there a way to patch /repair this hole? Its at the end of a pipe, that I guess is filled with lead and one of the edges where the filling meets has corroded through. I am afraid if I call someone to fix this they will surely want to replace it, but I just want to patch it at this time. How is this done? Sodering? Sealant? And keep in mind its just an overflow area.