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.
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?