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2 pipe vapor heating system

I have a 2 pipe vapor steam system with thermostatic radiator traps, no traps on steam main, radiators are piped to wet return only. Customer would like boiler replacement. System also has boiler return trap with float air eliminator & differencial loop. Need information on replacing boiler.


  • Al Letellier_9
    Al Letellier_9 Member Posts: 929
    changing boiler

    IF you are doing steam work, I hope you have a copy of Dan's Lost Art of Steam Heat. You should find your answers there. Too many variable to answer your question here.
  • Jamie Hall
    Jamie Hall Member Posts: 23,270
    As Al says

    need a lot more information. That said, it sounds as though there are a couple of oddities there. If the radiator traps are working, and the returns are to a wet return only, I'm not sure that I quite understand what the float air eliminator and boiler return trap are doing in there. Shouldn't need them. If you really do have a differential loop in there, that's great -- leave it. Just make sure the pressures on your new system are in the ounces range, not pounds, or differential loop won't work at all.

    There are a lot of good boilers out there.

    Give us some more info...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
This discussion has been closed.