I took it outside and rigged it up for a pressure test.
I also wanted to test the DHW coil. This boiler was diagnosed with a leaking coil causing the PRV to lift. To test this I just left the coil connections opened. If there's a leak, boiler water will come out of the coil.
After filling it for a few minutes I started to hear the coil hissing and then water came out of it. Well they were right, the DHW coil is bad. I decided to plug the coil and continue with the pressure test.
Once it got the boiler filled and pressured up, the pressure started to drop. I looked at the coil and I could see water weeping out from the coil nuts.
So now I have that same old classic coal boiler dilemma. Replace the leaking coil which is expensive and time consuming or just weld a plate over it so it never leaks again, cheap and easy.
Here's a shot of the "H" stamped data plate. It states "HEAT SURF 24.5" and "YR 87". I think these mean that the surface area inside the boiler is 24.5 sq ft and it was built in 1987.
I have 3 videos of the pressure test. Here is the first one.https://www.youtube.com/watch?v=DveXh4- ... e=youtu.be