I have three valves for my bath tub/shower. One for hot, one for cold, and one to switch the water from the bath faucet to the shower. The pressure is fine through the bath tub faucet, but when I swith it to the shower, it trickles out. Is there an easy fix? Thanks.
The problem is either a plugged up shower head or a defective diverter valve. You will have to check both to see which is not working. The shower head would be the first to check since it is easier and most likely to be plugged up.