Venting Bathroom and Laundry Rooms - Unnecessary Vents?

Discussion in 'IPC Plumbing Code Questions' started by Scott Yackley, Jul 13, 2020.

  1. Scott Yackley

    Scott Yackley New Member

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    Jul 13, 2020
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    Are the vent lines questioned in the picture necessary? Was thinking that these fixtures are all vented thru the main stack or wet vented from other fixtures.
     

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  2. Reach4

    Reach4 Well-Known Member

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    Shower could be wet vented by making the lav drain go horizontal on the same level as the shower trap arm. I think that would be true for UPC and IPC.
     
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  4. Terry

    Terry Administrator Staff Member

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    Occupation:
    Plumber
    Location:
    Bothell, Washington
    If the shower arm was on the same plane as the line to the lav, then the lav would vent. But since you raised that line up with a 90 bend, it now needs it's own vent.

    The washer should keep it's vent.

    The laundry tray can vent using the main vent stack.

    The toilet should not drop into a santee. The waste that lands into a tee on it's back will spread both ways.
     
  5. Scott Yackley

    Scott Yackley New Member

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    Thanks for the feedback. Here is an updated diagram. The toilet drops into a 4"x3" closet bend. Does the toilet drain still need a vent line, or can it vent to main vent stack?
     

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  6. Reach4

    Reach4 Well-Known Member

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    Location:
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    I think you need that toilet vent. If the tub and shower drainage joined the toilet flow before the big pipe, that would wet vent the toilet. But with your layout, the separate vent looks easier.

    Elbow below lavatory needs to be a long sweep. Toilet and standpipe vent bottoms should be combos (combines 45+wye).

    Standpipe and its trap are 2 inch.
     
  7. Scott Yackley

    Scott Yackley New Member

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    Adjustments made. Agree, would be more challenging to tie the tub and shower into the toilet drain line. Thanks!
     

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  8. Terry

    Terry Administrator Staff Member

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    Occupation:
    Plumber
    Location:
    Bothell, Washington
    That looks awesome! :)

    [​IMG]
     
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