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john wood water heater gurgling sounds backflow problem help?????
was servicing a new customers home today. they had concerns on a john wood oil fired hot water heater. when it runs and heats the water it has a gurgling,rushing noise very similar to an air bound boiler system. the cold water supply pipe felt hotter than the hot water out pipe. upon looking at the piping arrangement i noticed that there was no vacuum relief valve installed on the heater . this heater is not on street pressure its running approx. 50 lbs of pressure at a pressurized well tank its a stand alone heater, its not hooked to a boiler with a pump etc. would it help to raise the tank pressure and install a vacuum relief valve such as a watts n-36 . does it also need some sort of check valve or would a vacuum relief valve prevent the siphoning. any help will be appreciated.