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Thread: Cast Iron or PVC Flange?

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  1. #1
    DIY Junior Member BSwanson's Avatar
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    May 2006
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    New York
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    Default Cast Iron or PVC Flange?

    I need to replace two flanges. Is PVC better than Cast? Are they had to get in the cast pipe?

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    Sep 2004
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    New England
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    Default

    The strongest one would be a cast iron one leaded into th eold stand pipe. There are some internally expandable versions that basically clamp onto the pipe that would work. Probably other choices...one of the pros would have some thoughts.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Moderator & Master Plumber hj's Avatar
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    Aug 2004
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    Cave Creek, Arizona
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    25,617

    Default flange

    The couple of insertable ones I have tried to use on cast iron, had to be trimmed, then beat into the pipe, and even then they would not go all the way down to the floor.

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