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Valve hissing

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DPK99
DPK99 Member Posts: 14
in Strictly Steam
The valve to one radiator is hissing. It's a one pipe steam system with a new vent, and that vent is working well. But there is a hissing sound from that valve. I don't feel any air or steam escaping that area, nor does there appear to be any wetness on the floor near the valve. I'm wondering what to do about this sound. Replace the valve? Something else?

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  • delta T
    delta T Member Posts: 884
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    Is the valve all the way open?
  • luketheplumber
    luketheplumber Member Posts: 149
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    what type of valve do you have? some of the cheaper brands of air valves tend to misbehave.
    Could you post a picture of it?
    I just earned my GED and am looking for a apprenticeship with one of these steam gurus on this site!
  • DPK99
    DPK99 Member Posts: 14
    edited January 2021
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    I'll double check that it's all the way open, but I think it is. Here is a pic. Can you identity the type?




  • Jamie Hall
    Jamie Hall Member Posts: 23,327
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    Have you tried seeing if you can persuade it to stop by slightly tightening the packing nut on the valve stem?
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    DPK99
  • DPK99
    DPK99 Member Posts: 14
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    Hey now! Jamie. That did it I think. The packing nut was too loose.
    ethicalpaul

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