This is the pipe that is above the bathtub valve that allows the folw of water to the shower. I left the pipe open for more than a week and assumed that the water is out.
Originally posted by fourth year:
If the pipe is getting very hot, especially a long way above where you are heating it, then there is water in it. Even if the valve is closed, it could be allowing a little water into the pipe. And if the joint is above the valve, how did you get the standing water out of the pipe?