HELP please we replaced all of the galvanized pipes leading up from the house water tank to the bathtub with Pvc but we still have no hot water pressure I read something about a balance pressure ball in the hot water faucet or something like that I'm not sure what that is I have I have a high water knob in a cold water knobs with a faucet in the middle that controls the shower head and both the hot water and cold water come out of this faucet in the middle I want to know if you could be the galvanized pipe running from the hot water tank even though all the other house water pressure in the house is working fine please please please help us we wasted too much money and too much time trying to figure out this dilemma by the way the brand a faucet we have is glacier Bay and we just purchased it