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  1. #1
    Join Date
    Sep 2012
    New Jersey

    Default Proper dielectric fitting

    Hi guys,
    This is a connection between a copper drain pipe and the cast iron waste stack. It appears there is a proper brass di-electric coupling there, but I am not sure. Your opinions? Thanks.

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  2. #2
    Join Date
    Feb 2008
    Chicago IL

    Default Re: Proper dielectric fitting

    Looks like a standard copper reducing coupling installed into the cast fitting with lots of __it oozing out. Needs repair.
    I am not aware of anyone installing a dielectric fitting from copper to cast.
    "The Code is not a ceiling to reach but a floor to work up from"

  3. #3
    Join Date
    Feb 2009
    Southern Vancouver Island

    Default Re: Proper dielectric fitting

    What Markus said. If the joint is sealed the old way, first, a thick cord or 'oakum' is wrapped and pounded in around the copper pipe and then lead is poured into the gap between the copper pipe and the cast iron. So the copper doesn't come in contact with the iron.

    That could be a brass fitting on the end of the copper, but it doesn't need to be, AFAIK.

    What's that brown stuff? Did ya taste it?

    John Kogel, RHI, BC HI Lic #47455

  4. #4
    John A Warkentin's Avatar
    John A Warkentin Guest

    Default Re: Proper dielectric fitting

    DWV copper used to be a commonly used material. It was properly connected to cast iron, galvanized steel, glass pipe, asbestos cement pipe, clay pipe, and more recently pvc/abs plastic piping thru a variety of acceptable approved fittings/methods. Di-electric connections are not used on drainage-waste-vent system connections.
    John The Plumber

  5. #5
    Join Date
    Mar 2012
    Ben Lomond, CA

    Default Re: Proper dielectric fitting

    The joint appears to be leaking, so it is not a sealed joint anymore. That brownish ooze is most likely waste. Almost no one does lead & oakum anymore, for good reason. Can be replaced with a rubber" no hub" type connector or the rubber donut that fits in the pipe. In any case it is a leaking joint with health concerns.


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