The most common causes are leaking gauge glass fittings above the water line of the tank, excessive system pressure, undersized tank, or the tank has a leak above the water line.
What to do if pressure relief valve is leaking?
Leaking Relief Valve
- Turn off the water heater breaker.
- Shut off your water.
- Empty the water heater by draining the bottom and water inside your home.
- Remove the TPR valve and discharge tube by unscrewing with a wrench.
- Replace with a new TPR valve and discharge tube.
Is it normal for water to leak from pressure relief valve?
When there is too much pressure inside the tank, the valve opens up to relieve this pressure and some water will drip out of it. This is normal, and indicates that the valve is functioning properly.
How do you know if pressure relief valve is leaking?
Pressure relief valves sometime develop a drip when opened for the first time in years. Try opening and closing it a few times to see if it will seat itself. If you have a large leak or the drip doesn’t stop on its own in a day or two, the valve will need to be replaced.
Why is my hot water relief valve leaking?
Your water heater’s relief valve can start leaking for one of two reasons: either the valve was triggered to open because of excessive temperature or pressure, or the valve itself is faulty. In the first case, the valve will drain water out of the discharge pipe as explained above.
Why is hot water coming out of my overflow pipe?
Hot water systems
Water expands when heated, pressure builds up in the tank and is released through the overflow pipe. So water dripping or running from the valve can be a sign of a normal, functioning system. However, not all leaking overflow pipes are occurring due to normal pressure build up.
