Hi, my plumbing still have problem because of the stairs, even I can go straight down to the basement, I still can't reach the main soil pipe. Now I found that there is a way can go through 1st floor's ceiling and reach the wet wall(the area under the second floor's bathroom) but the new soil stack need a few offset, see the pic, does it work? Thank you very much!
Along A,B,C,D there are 3 90 degree joints , DE is a horizontal 45 degree.
Along A,B,C,D there are 3 90 degree joints , DE is a horizontal 45 degree.