Help with DWV layout for new bathroom - please review layout

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ivan1234

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I am converting a half bath to a full bath. The bathroom will contain a shower, toilet, and lavatory sink. The toilet will be in between the shower and lavatory.

I have started running my drain pipes (without gluing) and want to make sure that what I am planning will work properly.

I have attached a few photos. Can you please review?

I would like to use a wye connection on the vertical section of the closet arm to connect the drain for the lavatory. Is this allowed? There will be a vent installed on the vertical section of the closet arm between the toilet flange (not shown) and the wye connection for the lavatory (this is the 2 in pipe running from the tee to the wall). Will this work? The lavatory will have its own vent.

Thanks!

photo 3.JPGphoto 2.JPGphoto 1.JPG
 

Cacher_Chick

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No drain below grade should be smaller than 2" pipe.
Waste from the water closet cannot pass an un-vented fixture connection.
 
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