Adding a 2nd floor bathroom - venting and drain questions (see diagram) | Terry Love Plumbing Advice & Remodel DIY & Professional Forum

Greetings, and thanks in advance for any input!

Novice plumber (but quick learner, i think) here.

I purchased a 1923 house recently that had a leak coming from the toilet on the first floor. Subfloor was rotten, and has since been replaced. There was a hole in the old lead(?) flange, and so I took the opportunity to replace the corroded cast iron vent and drain pipes down into the basement as it was time.

while I am remodeling the bathroom and have the walls open, I would like to think...

Adding a 2nd floor bathroom - venting and drain questions (see diagram)