It wouldn't surprise me that things in that house are not up to code, I've been finding all kinds of issues.
So given the opportunity to re-do it right, how should I vent the existing sink, and the new washing machine drain?
In my case, what is the best way to route the additional vent?
The existing vent is downstream from the junction, does that make it a vent for the washer, and I should add a new vent for the sink on the right side of the image?
I'm building a laundry room in the basement.
There is readily accessible plumbing that I can cut into but I don't know if I need to run an additional vent pipe leg, and if so, where do I run it?
I've made a quick, rough representation model, of current fixtures in the basement (p-traps are not...