Don't let anyone but the older gentleman do the job. He has done previous good work, but the guys he sent out on the last job tore up the place for 2 hrs then left. Showed up 2 days later at 10:30am and by 10:40am found an excuse to leave. The general attitude was that they don't like what they do... and didn't want to do the job. I might suggest a different occupation for them, and a different plumber for you.