We added a new gas water heater, and after it was installed. The water pressure in the bathtub and bathroom sink wouldn't work. Can you tell me why and what to do to fix.
Thanks

Chances are you disturbed some old crud in the lines when you did the switch. It is usually just the hot that clogs up, did both hot and cold plug up for you? We are going to need to remove the screen or aerator and clean them and maybe the valve. When you come back tell us what your faucets look like and how many knobs.