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Main air vent

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georgearoush
georgearoush Member Posts: 37
in Strictly Steam

A simple question, but the answer I think might back “it depends.”

How do I know when it is time to change the main air vent? Are there any signs or clues I should look for that indicate it needs replacement?

Comments

  • 109A_5
    109A_5 Member Posts: 4,075

    Mostly if it does not close with the presence of steam. Also I suppose it if becomes restricted due to corrosion, etc.

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • ethicalpaul
    ethicalpaul Member Posts: 8,861

    yep it has to vent air and not steam. But I’ve seen them failed closed that you really couldn’t tell from in the living area of the house

    NJ Steam Homeowner.
    See my sight glass boiler videos: https://bit.ly/3sZW1el

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