Basement plumbing

[Brunstown]

Everything in red is existing. I plan to wet vent from the new 3” Vent. That wet vent would end at the toilet prior to the existing 1.5” vent, which is connected to the drain via a 3x3x3 wye and hub, which is inline with the proposed new plumbing upstream and existing plumbing downstream. Would it be to correct to increase the 1.5” Vent size and start a new wet vent for the remaining fixtures downstream? So it would be essentially 2 inline wet vents. IPC code here

 

[frodo]

 

[Brunstown]

Thank you for the quick response. I’m not sure I follow exactly. Are you suggesting to vent the toilet into the 1.5” (which would be changed to 2”)?

 

[frodo]

 

[Brunstown]

I hope I’m interpreting this correctly. Option 3 would be ideal. By venting the wc into the 1.5”(changed to 2”)solves my problem with the wc not being the last fixture on the wet vent?

 

[frodo]

 

[Brunstown]

Hey Frodo, this is all that currently exists in that section. The vent is inline with the drain.
Is this how the toilet in the new location should tie in?