Hello! I am a homeowner and have been plagued by a banging steam system ever since we had a new boiler installed (it was totally fine before). I have approached the installers plus two additional plumbers, and have been provided three different possible solutions. I have no idea which way to proceed, so was wondering if anyone would be willing to provide their opinion.
The new system is a Burnham IN4PVNI-M2, 65,000 BTU. It's a 1,000 square foot apartment on the first floor with four radiators. After installation, water was coming out of two of the air vents on the radiators and it was banging violently. The installer re-piped the water return pipe, making it steeper, and installed an air vent on the return, and that helped a little bit. But it still bangs and clangs a lot, and occasionally spews out water from the air vents. You can hear water sloshing around in the radiators too.
So we have three options:
1. The installer is telling us that all of this is due to the old piping (even though we never had the problem before). He is saying we now need to install (and pay for) a surge tank to catch some of the wet steam.
2. A second plumber has said we should be able to skim the boiler once or twice, and that should solve it. The installer has said they have skimmed it several times, but I cannot find a skim port on the boiler (please let me know if I am wrong). This would be the least expensive solution.
3. A third has suggested we need to completely repipe around the boiler: re-do the steam header, Hartford loop, condensate return, and makeup water line. He said the setup by the installer was totally wrong. This is the most expensive solution.
Based on the info above and photos below, what would you do? And how much do you agree with the other solutions?
Thank you very much in advance for any opinions! This frustrated homeowner would be eternally grateful!