slick50 said:BB, what's an old lead common
Lead Common Supply pipe.
Back in the good old days before inside lavvy's and hot running water houses were built with common supply pipes. One run of lead down the back entry or through the yards with a branch into the kitchen and a branch into the outhouse.
Usually find that they leak like sieves, mainly due to people removing the outside lavvy's and hammering the lead closed (rather than removing the whole branch as is required)