Posted by Kirk on December 31, 1998 at 17:23:37:
I have a newer house(1990) and when I take a shower the water temperature will change if water is turned on at any other location. Example if hot water is turned on the shower gets cold and if cold water is turned on the shower gets hot the water pressure never changes. The water supply line starts off with 1" and tappers down to 1/2" at the fixtures. Their is also a 1" pressure relief valve installed. Is their any thing I can install to help.