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Thread: 2" stack vent for 6 bathroom groups 2 washer machines

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  1. #1
    DIY Member yngwie_69's Avatar
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    Sep 2009
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    Default 2" stack vent for 6 bathroom groups 2 washer machines

    My boss asked me to do this in a small appartment building.... This just seems wrong.

    Am i safe with two 2" stack vents... 3 groups per vent

  2. #2
    Moderator & Master Plumber hj's Avatar
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    Aug 2004
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    Default

    It depends on how your code is written and what its parameters are. If you code requires that the vents out the roof have the save AREA as the incoming sewer, then you would need four 2" vents, but you also have to know what your code's limits are as far as fixtures connected to a 2" vent. I think one of these two requirements will negate just two vents.
    Licensed residential and commercial plumber

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