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one pipe/two pipe

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So my question is this.. Is it possible to have a combination of a 1 pipe and two pipe steam heating system? I have about half my radiators that have the typical vent but then have a bunch that are recessed in the wall that appear to have no vent, however on the inside bottom opposite the valve there is what appears to be a large nut. I am not sure what this is and am also puzzled that these radiators don't have vents like the others do....

Very confused in NJ

thanks in advance,
Chris

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 23,303
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    Picture picture pictures. We have to have pictures.

    In answer to your question, though, yes, it's perfectly possible to have a mix of one pipe and two pipe radiators. It's a bit of a bear to balance, but there's no reason why it won't work.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    luketheplumber
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,527
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    Just look and see how many pipes are connected to each radiator, it will either be 1 or 2 and yes pictures are a big help