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Old 07-11-2011, 05:21 PM   #1
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Venting a 3/4 bath in basement

I am finishing my basement and trying to layout the waste / Vent piping. Could I wet vent the shower and toilet through the sink drain or would I need to vent the toilet separately(dashed line). See attached sketch.

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Old 07-12-2011, 07:25 AM   #2
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Where I live, an AAV can vent one fixture, not a whole bathroom group.


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Old 07-12-2011, 09:45 AM   #3
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I checked with the inspectors and here I can vent 2 bath groups off 1aav. I know an aav is not ideal but I have no other option. I have tried to find viable routing to vent through the roof but with the layout of our house it won't work. There is a 1.5 inch vent pipe from an old floor drain but this is not adequate for the toilet. Other than that will either sketch work?
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