Another wet-vent question

[wi_DIY_plumber]

planning to add a 3-piece bathroom to the basement. The only thing existing so far is a pump basin with a 1.5" vent (only influent to this basin currently is floor drain by the HVAC)....would the attached plumbing layout work? Wondering if the section I have highlighted in red would be required or if the wet vent serving the toilet could be used for both?
Thanks,

 

[MicEd69]

For the red line to act as a vent, it has to come off the shower drain vertically, or not more than 45 degrees off vertical. You could accomplish that by putting the vent in the wall separating the toilet and the shower.

Or you could route the shower drain to upstream of the toilet. The existing toilet wet vent through the sink drain line would then act as the shower wet vent as well.

 

[Twowaxhack]

If you can connect your shower drain to the vertical 2” vent then you won’t need another vent.

That would be wet venting the toilet and the shower.