Two years ago I built a new, hundred-year olde English country house with which I am very pleased overall. Sadly, however, from the very getgo, there has been a leak. It's not massive but it is steady and it will preclude my ultimately turning the downstairs into living quarters much less ultimately selling the house. Original plumber is "flummoxed." So what do I do? The leak drips into the unfinished daylight basement from the mudroom and/or kitchen. I think of surgeons who snake cameras thru intestines; is there such a thing for pipes? I cringe at the thought of having to sue. How do I handle this? How do I get this plumber to solve the problem, one of HIS making?