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Discussion Starter · #1 ·
We are redoing our bathroom. There is a web of drain-line that takes up a lot of space and is unnecessary. I am moving the toilet and figure I could run it right into the drain coming from the second floor. The tee into the line would be just to the right of the pic.

Looking at the pic. Everything circled in green I would like to trash. The red X is where I would put a new cleanout Tee and the blue line represents a line to the vent (3").
 

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No tees on back can receive any drainage. You need to vent that toilet some how? Is the three by 2 tee on its back the lav for the bath room?
I would suggest you install a 3 by 1.5 inch wye run to the lav and use an AAV vent if approved by your local plumbing authority on the lav above the p trap picking up the drain.
 

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Discussion Starter · #3 ·
No tees on back can receive any drainage. You need to vent that toilet some how? Can a wye 3" recieve drainage? or can I turn the tee off its back 45 to receive it?

Is the three by 2 tee on its back the lav for the bath room? If you are talking the ABS, yes it was... I am taking out all the ABS... Also, I am separating the grey water to it's own system.

I would suggest you install a 3 by 1.5 inch wye run to the lav and use an AAV vent if approved by your local plumbing authority on the lav above the p trap picking up the drain.grey water system
 

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A Tee cannot be on it's back and used for drainage regardless of the angle.
You still need to vent the toilet...
 

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Discussion Starter · #7 ·
ok, if I were to put a wye into the horizontal drain coming from the upstairs... My toilet of the first floor is 4' from that line. If I were to come out of the flange with a 90, have 4 foot of horizontal then go down with another 90 into a 3' piece angled into THAT wye on it's back... would that work?
 
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