I recently purchased a 25 year old home. After moving in, I have discovered that the water flow from the hot water faucets are about half the flow of the cold water faucets. Is that called water pressure? I replaced the pressure control valve coming in to the house. I had a plmber come and try to fix the problem, and could not figure out what was wrong. The pressure seem to be good coming into the water tank, but the water flow to the 2 bath faucets , the tub, and kitchen go to a small stream when more than one faucet is turned on. WHERE DO i START? Thank you for you help.