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Steam Boiler Leaks inside, as water gauge gets low
So, my pilot light on my boiler was out today, so I re-lit it and it went out again. I re-lit a 2nd time and then watched the boiler. It runs fine for about 10 minutes or so, and then when the water gauge gets low, just about to the point where I am expecting the boiler to turn off, due to the water being low, it starts leaking inside, to the point that it completely puts out all the flames, pilot and all of the 'heaters'. I re-lit a 3rd time and same thing. It runs fine for about 10-15 minutes, then almost like an internal sprinkler, a bunch of water falls/sprays on the boiler flames and puts them all out. If anyone has any ideas what might cause this, I would greatly appreciate the help.
NOTE: It's a one-pipe steam boiler system. Burnham Boiler.