Can soil stack make more than one offset?

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Nixgnoy

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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.
image.jpg
 

Nixgnoy

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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.View attachment 27391
Sorry, I check the code it doesn't allow to connect anything around the soil stack offset in a specific distance except the relief vent pipe, so this diagram won't work. Thank you!
 

Nixgnoy

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Sorry, I check the code it doesn't allow to connect anything around the soil stack offset in a specific distance except the relief vent pipe, so this diagram won't work. Thank you!
Oh! Mistake again! The code I saw is talking about an one vent pipe system, which is prohibited by Canada code. So if I vent every fixture in my system, can it work? Thank you very much!
 

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Hi! A is the stack vent.
But from WC to B will be a Horizontal 90 degree; then from B to C is Horizontal to Vertical; from C to D is Vertical to Horizontal; from D to E is a Horizontal 45 degree, then again 90 degree to the main soil stack.
 
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