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

    Feb 27, 2007, 04:26 PM
    Pipe size?
    I live in san francisco and am adding a lavitory sink I plan to connect to current shower drain with a wye and loop vent through same what size pipe do I need and what is the best way to support it ? Sink will be 4 1/2 feet from shower drain thank you tallgrass:o
    doug238's Avatar
    doug238 Posts: 1,560, Reputation: 62
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    #2

    Feb 27, 2007, 05:53 PM
    Trap size on a lavatory is 1 1/4". pipe size should be 1 1/2"
    doug238's Avatar
    doug238 Posts: 1,560, Reputation: 62
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    #3

    Feb 28, 2007, 05:10 AM
    A vent must be at least 6" above the flood level rim of the fixture
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