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Main steam air valve or hydronic heat air valve ?

This is the main air valve on my steam boiler is this correct? The air is venting through this tiny valve but it looks like the wrong one. 


  • mattmia2
    mattmia2 Member Posts: 7,184
    No. Those are marketed as steam or hot water automatic vents but they really are not good at either. That should be replaced with one or more steam main vents.
  • Jamie Hall
    Jamie Hall Member Posts: 20,462
    Poor little thing. Wrong valve, may well be in the wrong place. How is that connected to the steam main piping?
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • S_olanooptical1
    S_olanooptical1 Member Posts: 2
    It is connected to the vértice return pipe. Also, Should I move it away from the elbow with a vértice nipple?