pressure relief valve

The tank should have 12 PSI WHEN THE SYSTEM PRESSURE IS ZERO. It can not be tested with pressure in the system. I still think you'll find the problem is too small a tank.

It's possible that he just got another bad valve. I had that happen to me and once I switched brands the leak went away.

The best thing to do to make it last a long time is to mount it on a six inch or longer nipple. The valve does not get hot from bolier temp. and seems to last alot longer.



R.Y

Back to work onthe stoker again: I shut down the water feed and drained about a gallon out. this took my pressure down to 25 psi and stopped the leak. Ileft the feed off over night to see what happens. in the morning the pressure went back up and leaked some.At this point i,m going to change water feed pressure regulator,which is very old and the exp tank.Does anyone know the a part # and brand on the water pressure feed valve,ithink it should be 15 psi? Thank for all the posts. Rick

If you shut off the pressure reducing valve overnight and the pressure still went up, wouldn't you suspect something else? Why not conduct the same experiment again and also shut off the inlet and outlet of your water coil?

I forgot to metion that i did have the heating coil shut down. I fired up my gas hot water heater i use for the summer.

Thanks everyone for all the help. It turned to be the pressure reducing water inlet valve. The pressure is now 15 psi. I did notice when i turned the tank less heating coil back on a day later it went up to 20. It also comes threw the pressure reducing valve is that normal? Or do i have a small leak in the heating coil

It sounds like you also have a pinhole leak in the water coil.