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What is this?

MK399 Member Posts: 1
This is from an abandoned part of the system. I’m guessing it was an old air vent. Please let me know if anyone has any information on this device. 


  • Jamie Hall
    Jamie Hall Member Posts: 21,111
    more like a safety valve?
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Steamhead
    Steamhead Member Posts: 15,991

    more like a safety valve?

    Yup. The lever is for opening the valve manually.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service