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Thanks Tom. The information you provide is very helpful.

I may use AAV to vent my basement as I read other forum saying AAV is fine with GA building code.

Further questions:
1. Where can I...

I would like make sure I understand the item 2)
2)The second one said that I do not need vent, just using wet vent and mechanical vent.

It depends upon how the roughin was done as to whether...

Hi, Tom

Thank you for your answer

Per your answer, it is possible to use wet vent. I am more intersted this approach.
Is there any specific requirement for roughin in order to use wet vent.
...

I want to install a bath room with toilet, tub/shower and sink in my unfinished basement.

There are three pipes combing from ground.
But there is not vent combing down from the basement roof.
...