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Cast Iron Rad Resize

Sam_NW
Sam_NW Member Posts: 3
in Radiant Heating
I just removed several sections of a cast iron radiator. (It's got push nipples and threaded rods.) I put it back together and pressured it up and I've got drips from the new joints. The nipples don't look bad to me. Do I need to use a sealant of some kind? Should I get new nipples? From Dan's FAQ on resizing, it sounds like no sealant, etc. is required - just a tight fit.

Comments

  • Ironman
    Ironman Member Posts: 7,510
    Leaking Rads

    You have to use new push nipples when you take rad sections apart. The nipples are mild steel and they conform to the cast iron which is harder. A little lubricant, such as cutting oil, will aid assembly.



    Sometimes you get lucky with old nipples, but quite often you get the kind of results that you've experienced.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Sam_NW
    Sam_NW Member Posts: 3
    Thank you

    Allright. That's what I needed to know; thanks for the info.
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