My water heater is 4 years old. I noticed very hot water coming out of all faucets, no cold water and a whistling noise. Added a regulator to stop back flow on cold water. Replaced pressure relief valve, all faucets start to leak. NEW Pressure relief valve started to leak- replaced it again, now that one leaks too! Have a pressure reducer to reduce water pressure coming into the house on main line- set at 60 PSI.
There is an exchanger that sits on top of the water heater for in floor heat. Can someone PLEASE tell my why my pressure releif valve will not work? I am on the third one in three week. I have also been through 3 water heaters in ten years. HELP!