water heater relief valve?
New this spring Keystone Hornet. Got to the CG this afternoon and turned the WH on. About 5 min before it turned off I noticed water dripping from the cover. It was coming from the relief valve. I tr...
Forum Discussion
YamaDooed wrote:
Turn off pump or shut off city water supply off and water heater. Then slow open relief valve and drain out relief valve to establish a air gap in the top of the water heater. Turn water pump and heater back on.
The reason it leaks is because fluids dont compress so when water is heated it expands out the relief valve. Thus the established air gap now compresses and absorbs the water expansion without escaping out the relief valve.
Actual procedure is in the water heater manual.
The procedure I use is that after I connect my hose to the city water I always turn on the hot water in the kitchen first. Since the hose is full of air, this air (and water) flows into the water heater and creates the required air pocket.
