Can a 2" DWV WC vent also be used to vent a 1-1/2" basin drain?

Folks,

Brand new poster here.

Spouse and I are building a new retirement residence.

I'm doing the DWV work.

Can a 2" DWV WC vent (PVC - all the way to attic vent manifold) also be used to vent a 1-1/2" basin drain (combined into from basin 6+ inches above basin flood rim)? Or, must the basin vent be run seperately to the attic vent manifold (4")?

Regards, JLB

Yes it can !



Two bathroom groups with one 2" vent

777,

Thank you.

Regards, JLB