I had a new water heater installed about a year ago. I have noticed
that over the course of the year the pressure has gotten worse to the
point that in the bathroom furthest from the hot water heater there is
barely any pressure coming from hot water in bathtub. When they
installed the new water heater they added a valve on the inlet side of
the water heater. Is it possible that this valve is either corroded
with sediment or bad all together. Please any help would be appreciated.