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venting mains

Irv Member Posts: 95
How can I tell if the mains are venting quick enough?
I have a one pipe steam system, and currently have a Gorton #1 at the end of each main.


  • Unknown

    When the mains are cold, turn up the heat and time it's movement. Start your stopwatch when the header above the boiler gets steam-hot. Go to the main vent in question and stop your stopwatch when the vent gets steam-hot.

    In general, a good time is between one and two minutes for the main to fill with steam.

  • Steamhead (in transit)
    Steamhead (in transit) Member Posts: 6,688
    Tell us

    the length and diameter of your mains, and we'll let you know. Then time them out like Noel says.

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  • Irv
    Irv Member Posts: 95

    One of the mains is 49'
    The other is 33'
    The diameter of the pipe is 2" (outside dimension 7.5").
    I currently have one gorton #1 at the end of each main, and am considering adding others off a tree.It is one pipe system.
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