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steam leak from supply knob.

Hi all, there is a steam leak from the knob you turn - steam comes up from where the knob rod meets the supply pipe - of one of my radiators (See pic). Any easier fix short of replacing? tape? silicon? i could put around it? It seems to get better/ stop if i tighten the valve most of the way, but I was under the impression you should always keep them open as far as they can go. Thanks so much in advance for any help!

Comments

  • NewJerseyKirk
    NewJerseyKirk Member Posts: 4

  • Steamhead
    Steamhead Member Posts: 16,719
    That valve needs to be re-packed, not replaced. Get some Teflon string packing. Loosen the nut and unscrew it (but don't force anything). Wrap the packing clockwise around the stem under the nut, then reassemble and tighten the nut. You should feel some resistance as you turn the knob. If not, add more packing.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    jringel
  • Tommi68
    Tommi68 Member Posts: 25
    It seems to get better/ stop if i tighten the valve most of the way, but I was under the impression you should always keep them open as far as they can go.

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    If your rad has two pipes; one in and one out, them you can moderate your temperature by opening and closing the valve at the handle, the condensate always has a path to return to the boiler. If your rad only has one pipe, then the valve should be open or closed, being partially closed will impede gravity removal of condensate.