Water Heater Pop Off Valve Keeps Opening

First turn off the gas to the water heater or flip the breaker if it s electric.

Water heater pop off valve keeps opening.

Your water heater s relief valve can start leaking for one of two reasons. These numbers will be printed right on the valve or on a tag attached to the. The unit is 12 yrs old. I will first advise shutting off the cold water supply to the pressure reducing valve once the 12 15 static fill has been established.

First you must drain the water heater by attaching a garden hose to the drain valve and then running the other end of the hose to a floor drain or a shower drain. First off i would like you to determine whether the relief valve is popping off due to excessive makeup water or static fill pressure or if the temperature in the boiler is becoming excessive. I haven t seen it but there is water on the floor and also on top of a hose that is rolled up next to the water heater. Open the valve at the bottom and the pressure relief valve for a minute to drain a little water out of the tank and relieve the pressure.

Either the valve was triggered to open because of excessive temperature or pressure or the valve itself is faulty. Both upper and lower thermostats are set to 120 but water temp from the tap is 149 and jumps back and forth to 151 and 149. 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. It is a a o smith electric ecs 40 200.

Remove the overflow pipe from the pressure relief valve. I did some research and my guess would be that the. It is easy to isolate your problem to the hott water not the water feed just read the tag that comes on all the tmps they have a preassure rating at witch the will set off your water heater is the only thing that can heat water up to those psi to make it go off. Close the cold water cut off valve going into the water heater.

In the first case the valve will drain water out of the discharge pipe as explained above.