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Purpose of Screw on this Cast Iron Radiator?

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MrCofDG
MrCofDG Member Posts: 40
Hi folks,
Yesterday I noticed a screw on the side of a cast iron rad in the house - I've never used this screw (the bleed valve is at the other end, which I have used). I haven't tried turning this 'new' screw yet, fearing a hard-to-fix leak. Any idea/opinion as to the purpose of this screw ? Pictures attached. 1st pic is looking at the head of the screw -
2nd pic is looking from above (radiator in question is on the left) -

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 23,524
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    Odds are it was just another place for a bleeder... I'd leave it be.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    mikeg2015PC7060
  • AMservices
    AMservices Member Posts: 610
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    I think that screw is for the end cap piece that hides the piping.
    Alan (California Radiant) ForbesPC7060
  • JohnNY
    JohnNY Member Posts: 3,244
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    Yes. It holds the end cap in place. The original was probably a thumb screw.
    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
    Classes
    EdTheHeaterManPC7060
  • MrCofDG
    MrCofDG Member Posts: 40
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    Now I noticed the same sort of screw on sides of radiators at another inside corner in another room. It does look like it could be used for securing an end cap, or for a bleeder valve at installation time. I'm gonna leave 'em alone. Thank you gentlemen.
  • ratio
    ratio Member Posts: 3,674
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    A one-post necro

    a lack of added content

    spam is yet to come

  • pecmsg
    pecmsg Member Posts: 4,909
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    ratio said:
    A one-post necro

    a lack of added content

    spam is yet to come

    https://m.youtube.com/watch?v=mBcY3W5WgNU
  • Erin Holohan Haskell
    Erin Holohan Haskell Member, Moderator, Administrator Posts: 2,333
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    Got it. Thanks!

    President
    HeatingHelp.com