Vent Placement

[MorganB]

I am doing a DIY basement remodel. Most of what needs to be done is to raise the current lines for the first floor up into the joists to raise the basement ceiling as far as possible. Before I scheduled an inspector to come I would love to get your thoughts. I'm not much of an artist so if you have questions about the schematic let me know. Assume the flow grades are all correct, what I am really unsure of is the venting. As it stands the only vent I have is the center stack. I have thought about adding a studor vent under the sink (top right) or/and between the tub and shower on the bottom left. I tried to draw to scale, but suffice to say all the fixtures would be within a 48" radius of the center stack.

All of the boxed fixtures are on the top floor, and the non boxed are in the basement.

I am also installing a new shower and lav in the basement.

Thanks in advance for any comments!

 

[Terry]

The shower and tub need to be vented before entering in downstream of the toilet. It should have a 2" vent.
The lav wet vents the other toilet if run in 2".

 

[Sponsor]

 

[MorganB]

Terry, thanks for the speedy response. I have learned a bunch reading your website, it's great.
I have 2 options to vent the shower tub combo. I can use an aav in the wall near the fixtures, or tie into a vent that parallels the stack. The vent ties into the stack about 36" above the floor. However it's only 1 1/2". I attached an updated picture.

 

[Terry]

The 1.5" would vent the tub and shower.
That may be enough. In Canada it would be.