In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Finding a leak in underground return line
I must have a hidden leak in my underground return line - I was losing 500 gallons a day the last week of April 2017 until the weather got warm and I was able to shut the boiler off. I have a 21 unit multifamily and it's a single-pipe steam system. After I shut the boiler off, it took about 2 hours and the boiler was emptied of water completely. The boiler room is as dry as a bone, as are the areas around the visible return lines. Any suggestions on how I find the leak?