I had a friend of a friend come in and try to remodel my bathroom. He had to move pipes, unsuccessfully I might add. After three days of still having leaks, I hired a real plumber who came in and was finished in an hour. I have another bathroom on the same floor as the bathroom being remodeled (second story). The tap water in the second bathroom now is tasting funny, like undrinkable, and has an odor. The taste and odor is very strong on the cold water, but very light almost nil on the hot water. I can't exactly identify the taste but I would say a chemical kind of taste or perhaps charcoal?? I am wondering if the first idiot who didn't know what he was doing when soldering, soldered the pipes so much that it somehow got into the pipes and is affecting my second bathroom since they are on the same floor and probably share pipes. The water on the first floor is unaffected. The real plumber stated that the other guy was using cheap flux and was overheating it so it would just dissipate rather than actually solder the pipe. Thank you for any suggestions!