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loud banging after oil->gas conversion can't sleep
So we just bit the bullet and did a oil to gas conversion. The previous system worked okay but oil was expensive! The old system had no banging. So after doing the conversion the system bangs really loudly when it first fires up and then eventually the banging stops but the banging sounds so loud it sounds like a pipe is going to explode so we've been a bit worried about what to do about it. We called the original plumber back a few times but they just haven't been able to do anything about the banging. They took some measurements and said everything was ok. We even had a second plumber come in and he said that a cleaning of the boiler should be done. We told the plumber who did the install about that and they came again to flush the system some more but couldn't find any problems with the install. At this point we're not sure what to do next as we're not heating experts and just looking to see if anyone has any ideas for us. I'm attaching some pics of the setup. The water in the one picture looks dirty to me but I'm not sure if that's relevant at all.
Oh I should mention, the system is a one-pipe steam system. And after the install when we first mentioned the problem to our plumber they had to lower the pressure which apparently was initially set to be too high.