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Thread: Vent for Bathroom Sink

  1. #1
    DIY Junior Member
    Join Date
    Nov 2009
    Albany, NY

    Default Vent for Bathroom Sink

    Can I have my vent come up right over the drain, make a turn then go down to the 4 inch main stack/vent? Does the vent need to be sloped up on its way to the main vent? If so, what tee do I use at the junction between drain and vertical part of vent? (sanitary tee) Also, if my sink is within 4 feet of the main do I need a vent ( I think yes ).
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  2. #2


    The vent is not supposed to be back graded towards the stack. Also, the vent needs to be within 42" of the p-trap, and the vent should tie in at least 6" above the sink rim.


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