Help with venting basement bath

[Bryanbdp]

I am installing a basement bathroom with underslab plumbing to pump tank.
I am trying to minimize slab cutting.
Can I use this layout with vents as shown? (Vertical vents shown in red)
Any help would be greatly appreciated!

 

[hj]

The "vent" for the shower is completely useless. Flushing the toilet could siphon the shower trap.

 

[Sponsor]

 

[wwhitney]

If I understand the diagram correctly, it is showing the WC dry vented just before the WC joins the shower. The IPC (in use by CT) allows a dry vented WC to wet vent other fixtures, so the shower is wet vented by the WC.

Cheers, Wayne

 

[Jeff H Young]

I don't horizontal wet vent , but with 2 vents why would it siphon?

 

[Bryanbdp]

Here's the piping I finally used and passed inspection. Vent is in shower arm, which wet vents toilet. There is also a vanity drain which could be considered a wet vent for the toilet pipe. I also wonder if the toilet was closer to the tank and not combined with anything else, perhaps within 6 feet, if it would need a vent at all. It seems like the tank would act as a stack since it is fully vented.