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Identify what this is?

cunninghamzach Member Posts: 19

December 2023 in THE MAIN WALL

Anyone familiar with what this is? Steam system, assuming it was a vapor system at one point in time.

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  Chris_L Member Posts: 345

  December 2023

  Not familiar with it, but the first hit I get on a Google search for Kriebel steam system is this document on this HeatingHelp site: https://heatinghelp.com/assets/documents/Vapor-Vacuum-Heating-Kriebel-System-1910.pdf

  

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  Steamhead Member Posts: 17,815

  December 2023 edited December 2023

  @cunninghamzach , that's a Kriebel System main air vent. It works by differential expansion. See chapter 15 of @DanHolohan 's "The Lost Art of Steam Heating" for details.

  All Steamed Up, Inc.
  Towson, MD, USA
  Steam, Vapor & Hot-Water Heating Specialists
  Oil & Gas Burner Service
  Consulting

  

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