Dear Melissa: This is a very common problem when your bathtub has the old two-handle (hot and cold) shower valve. When a toilet is flushed or the cold water faucet in the kitchen is opened ...

Test the shower to ensure no more water is running. Open the ball valve with a 1/4 turn (so the handle is perpendicular to the pipe) and let the water drain. Open both hot and cold water lines to ...