Reply To: shower water pressure decreases

Sounds like you have one handle for cold and one for hot. The valve seat at the back of the valve may be loose.

Turn off the water, pull out the valve and check the screw at the very back tip. This may be a good time to just go ahead and replace the rubber valve seat.

It’s a pretty straight forward job and if you turn off the water before you start and remember how you took the valve out, (draw a picture if you need to) you can’t go wrong.

Hot water expands metal and when it is cold, it constricts. Over time, that can loosen the screw. This is why it is happening only on the hot side
Good luck.

Ted