Plumbing Questions? Ask a Plumber and Get Answers ASAP.
Hi my name is ***** ***** I have been in the plumbing field for 20 years. I will be glad to help you today. The pressure relief valve will have to be replaced. The cause is thermal expansion in the plumbing system. If you have city metered water you will want to replace your thermal expansion tank. If there is water leaking out of any other place in the water heater besides a fitting then the water heater itself would need to be replaced.
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Does the pilot stay lit? What setting is the thermostat on?
Do you have a circulation pump for instant hot water?
Is the flame yellow or blue?
Do you have a multimeter? Will you test the voltage on the gas valve if you do? What color is the flame on the burner when fired?
There are a few things that can cause this. Could be excessive gas pressure, a blocked vent, vent not connected properly, failing gas valve, dirty or incorrect orifice, improper air shutter adjustment or blocked orifice. The orifice will need to be cleaned, vent checked for any blockage, be sure the vent is connected properly to the water heater, secure the shield door and check the voltage on the gas valve is 12v, otherwise a gas certified tech will have to test your gas pressure and check the air shutter in the water heater.
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