I recently inspected a property and the water was off at the interior main. I carry an air compressor with me which I use to do plumbing pressure tests at foreclosed / winterized properties (I do lots of these) and the system wasn’t holding pressure because of a leaking tub faucet / valve. Obviously I didn’t turn on the water because of the liability of other leaks. I should also note that about 50% of the plumbing was polybutylene adding to my skepticism of additional leaks. Now for my question. Should I charge more to return to inspect the plumbing system once the water is restored? In this instance I told them I would return but for future reference what should I charge?