Any tips for removing ancient steam-radiator air-vents without breaking?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by JimNY, Sep 14, 2020.

  1. JimNY

    JimNY New Member

    Joined:
    Jan 21, 2019
    Location:
    NY
    Hi all,

    Like most every old threaded connection in the old house, wouldn't be surprised if the the air-vents break off rather than unscrewing cleanly.

    Detail: Single pipe steam heat. Cast-iron radiators. Air-vent valves not touched in a half-century. Would like to change-out as (observed at the end of the last heating season) the majority either let air and steam out constantly, and a few others take forever to let air out to permit steam to come in.

    Thanks.
     
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