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    Plumbing ?

    Plumbing ?

    New postby garrett on Sat Sep 03, 2011 1:12 pm

    How far from a vent stack can the kitchen drain be located?
    Thank you,
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    Joined: Thu Apr 28, 2011 1:34 pm

    Re: Plumbing ?

    New postby Jerry Peck - Codeman on Sat Sep 03, 2011 2:37 pm

    The answer depends on the size of the pipe from the trap to the vent, the pipe is required to slope 1/4 inch per foot for 2 inches and smaller, which means smaller pipe must be shorter in length to allow the pipe to remain open and vented.
    - 1-1/2 inch pipe is allowed to have a maximum distance of 6 feet from the weir of the trap to the vent.
    - 2 inch pipe is allowed to have a maximum distance of 8 feet from the weir of the trap to the vent.

    3 inch and 4 inch pipe are allowed greater distances, not only because they are larger in size, but also because their slope is only required to be 1/8 inch per foot, but you would not have pipe that size for the kitchen drain.

    Keep in mind that if you slope a pipe greater than the 1/4 inch per foot, or greater than the 1/8 inch per foot, the allowable distance is going to become considerably shorter the more the pipe is sloped.
    Jerry Peck - CodeMan

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    Construction Litigation Consultants, LLC.
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