so the pipes were banging on this steam boiler when it started raising pressure. the banging was really bad. the water as the boiler was running was moving lower and lower in the glass till it was gone. So i shut off boiler. I decided to drain down the boiler. I decided to remove the sight glass and clean it and i also pulled off the pig tail and flushed the gunk out of it. then i took low water cut off sensor out and cleaned it. put everything back together flush some water throu the boiler. filled boiler back up. then all that loud banging went away. the water even stopped surging it just stayed at the same level as my boiler cycled at proper pressures. could i have had a clogged return and by flushing out my boiler cleared it out?