Water weeping from hot water tank pressure valve.
- Thread starter Sudsman
- Start date
Also when filling the tank keep the pressure relief valve closed. Your water heater must have a small amount of air at the top for expansion. If you open the pressure valve and allow air to escape your tank will fill to the top. When the water expands there is no room and it forces the pressure valve open to release pressure and water escapes.
RoadJunkie
Well-known member
Have you checked your regulator with a gauge, or just relying on the setting to determine 50psi?
I made sure to drain about half the tank from the anode plug, with the pressure relief valve closed, to be sure I have an air gap at the top. after heating it up, still weeping!
Hummm, the relief valve is preset to 210 degrees, I replaced it just in case. The water gauge I have is telling me my water is 131 degrees. stumped.
Temp is reading 131 degrees. 🧐
CoveredWagon
Well-known member
Burp it a couple of times. Let it snap closed.
Dahillbilly
Well-known member
I've had mine to that several times; just burped it letting it snap shut & all is good.
Hello Sudsman,
When I dewinterized our camper this spring I had the same issue. I tuned off the water heater to let it cool down then opened the T & P valve a couple of times to let some water out. I noticed some lime scale came out and the weeping stopped. I did not flush the water heater before winterization last fall. When I dewinterize I open the T & P valve to confirm air is coming out at the valve then shut it and open the hot water in the bathroom until to let air out then shut it when a full stream of water is coming out. Then open the rest of the hot water faucets until air is out of the line. For me I think I caused some lime scale to get stuck in the T & P valve.
When I dewinterized our camper this spring I had the same issue. I tuned off the water heater to let it cool down then opened the T & P valve a couple of times to let some water out. I noticed some lime scale came out and the weeping stopped. I did not flush the water heater before winterization last fall. When I dewinterize I open the T & P valve to confirm air is coming out at the valve then shut it and open the hot water in the bathroom until to let air out then shut it when a full stream of water is coming out. Then open the rest of the hot water faucets until air is out of the line. For me I think I caused some lime scale to get stuck in the T & P valve.
CoveredWagon
Well-known member
Google, " how to descale a RV water heater ".
I've done this and you'd be surprised how much scale came out.
I've done this and you'd be surprised how much scale came out.
jerryjay11
Well-known member
P.S. the accumulator above is also known as an expansion tank.
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If you have a back flow preventer installed on your water line, it is probably due to water expansion and system pressure rising. If the problem goes away when the backflow preventer is removed, then you should add an expansion tank. I had the same issue and with the installation of the expansion tank, the problem went away.
