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Cast iron Radiator hole

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Johnm08
Johnm08 Member Posts: 3
edited March 25 in Radiant Heating

Hi

I got given a set of cast iron Radiators. Was hoping to get someone opinions on moving forward. So I work in a fab shop and I am a welder so I have access to industrial machinery. I put this radiator through an industrial sandblasting machine and came out with a small hole on one of the columns. I would like to repair it so it lasts if that’s possible. Anyone have any suggestions on how to fix ? Thanks

IMG_3733.jpeg IMG_3731.jpeg

Comments

  • mattmia2
    mattmia2 Member Posts: 16,890
    edited March 25

    braze it

    you could also drill it out and tap a 1/8" npt plug in it.

    are you using this for steam or hot water?

    you can buy that style of radiator new from castrads. you can buy a slightly fancier radiator that style from us boiler.

  • Johnm08
    Johnm08 Member Posts: 3

    I’m based in the Uk. I will be using it for hot water so the pressure won’t be going above 1-1.5 bar

  • ethicalpaul
    ethicalpaul Member Posts: 8,850

    Castrads is based in the UK. They have offices in the US but I bet your delivery cost is less than we pay!!

    NJ Steam Homeowner.
    See my sight glass boiler videos: https://bit.ly/3sZW1el

  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,713

    J-B Weld from Amazon

    Retired and loving it.
    jesmed1
  • 4GenPlumber
    4GenPlumber Member Posts: 175

    I would tap it and throw in a plug.

    Johnm08PC7060
  • Johnm08
    Johnm08 Member Posts: 3
    https://forum.heatinghelp.com/discussion/comment/1892793#Comment_1892793

    If I wanted to buy new I would have. I am simply wanting some advice on different options to fix and weigh them out. I was given these and told to try my best. Always got to be someone like you in the comments

  • jesmed1
    jesmed1 Member Posts: 1,481
    edited March 25

    Listen to the pro @DanHolohan . A relatively small hole, a low pressure application, and you've cleaned the surface prefectly for adhesion by sandblasting. Some JB Weld will last forever.

    Larry Weingarten
  • ethicalpaul
    ethicalpaul Member Posts: 8,850
    https://forum.heatinghelp.com/discussion/comment/1892803#Comment_1892803

    I didn't mean to anger you. When someone mentioned Castrads you responded that you were in the UK which made me think you must have thought Castrads was in the US. Please forgive me my hideous transgression, I feel shame.

    NJ Steam Homeowner.
    See my sight glass boiler videos: https://bit.ly/3sZW1el

  • Intplm.
    Intplm. Member Posts: 3,033

    @mattmia2 suggests drill and tap. A very good idea. From the look of it, you can probably tap the hole without needing any drilling. In viewing the picture a 1/8" or 1/4" tap should do it with the appropriate sized plug?

  • PC7060
    PC7060 Member Posts: 1,813
    https://forum.heatinghelp.com/discussion/comment/1892796#Comment_1892796

    or any small bolt with JB weld under the head.

  • mattmia2
    mattmia2 Member Posts: 16,890

    a plug or series of plugs with a certain loctite formula is how they fix cracks in ci engine blocks.

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