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    tallgrass's Avatar
    tallgrass Posts: 8, Reputation: 1
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    #1

    Mar 13, 2007, 08:17 PM
    Pipe type for drain
    An someone please explain the difference between dvw and water pipe as it pertaines to copper pipe fittings thanks tallgrass:o :o :confused: :o
    doug238's Avatar
    doug238 Posts: 1,560, Reputation: 62
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    #2

    Mar 13, 2007, 09:12 PM
    You have thin wall type m water pipe. It has red ink. Type l has blue ink. Dwv has yellow ink, and I don't remember what type k color is. The dwv has a thinner wall and is cheaper. Type l is thicker than type m and typically type m is residential and type l is commercial and type k is used under concrete where you really want a very thick walled pipe.
    Water fittings generally are not throated. They abruptly turn. Dwv fittings have a shallower cup and are throated, that is to say, they sweep as they turn.
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