1 either the water pressure inside the tank is too high 2 the water temperature is too high 3 the t p valve hasn t been used in a few years 4 the wrong t p valve was installed or 5 the t p valve itself has failed.
Water relief valve leaking.
Turn off the water to the coil and check if the pressure stops rising.
When you see water coming out from the water heater release valve there are two most likely causes.
The second reason a water heater relief valve leaks is the water has gotten too hot if the temperature of the water in the water heater reaches above 210 degrees f the relief valve will leak or even blow off this is why the outlet of the relief valve must be piped to about 6 inches from the ground you would not want to get a blast of 210 degree f water in the face.
So why does my water heater pressure relief valve leak.
There s a problem with the valve such as a faulty seal and the water is unintentionally leaking.
A leakage in your water heater pressure relief valve is a sign of a malfunction in your overflow valve.
In the first case the valve will drain water out of the discharge pipe as explained above.
Some boilers have a tankless water heater or what is also known as a hot water coil.
You may find that your water pressure relief valve may begin to leak after it has been flushed.
It may also begin to leak after time or if it was not installed properly.
The relief valve is working the way it s intended and water drained to reduce the pressure inside the tank.
It all comes down to knowing how to fix it.
There are numerous possible reasons your water heater s pressure relief valve leaks.
It s better to take precautions before waiting till things get worse.
A leaking relief valve at the water heater.
And many homeowners have complained that faulty and unattended temperature pressure relief valves have exploded at times they least expected in most cases.
There are a lot of different things that may have caused your water pressure relief valve to begin to leak.
Your water heater s relief valve can start leaking for one of two reasons.