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Need help with Buderus Logano G115 corrosion

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TadTV
TadTV Member Posts: 1
in Oil Heating
I am visiting my older parents for a few days and discovered this problem on their boiler. Buderus Lagano G115 w5. It was installed in 2009 and there is major corrosion around the return fitting. Is there a bolt on fitting plate to replace or is that the whole expensive and heavy boiler? What would cause this? Electrolysis? A drip at the fitting that a plumber supposedly caused a few years back. There are dissimilar metals there I see. Brass into steal? Could it be surface corrosion, or Is the whole things hot? Thanks for the help. Photos below.




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  • Ironman
    Ironman Member Posts: 7,376
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    You got a long term leak there. You should have it repaired asap.

    Brass is a dielectric.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Zman
    Zman Member Posts: 7,569
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    It more than likely just needs someone to take apart the fittings and re seal.
    It is a pretty committing job so it would be best to call a pro.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • HVACNUT
    HVACNUT Member Posts: 5,835
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    The G115 has a 1" return to help prevent shock and condensing.
    I would ask the contractor to repipe it with black pipe out of the boiler block and then go to copper.
    I'd like to see how the whole boiler is piped.

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