New Bathroom in-wall toilet install and mainline connection

[Dan Park]

Hello,

I'm remodeling my 2nd bathroom and installing a new Gerberit in wall tank toilet frame. I would love to get your opinions on my plans for connecting to the mainline for the toilet.

I have a 3" ABS mainline which you can see in the 1st picture. It's roughly 1.5ft down from the bottom plate of wall.

The 2nd picture shows my proposed piping for drain and air vent. The air vent will be off the 3" combi wye with the 2" going up the wall and connecting to the existing 2" vent stack in the 2nd picture. Everything else will be 3" connecting to the mainline. It's all a bunch of different 22's, 45's, and a 90 joined together to make that bend to the mainline.

Any issues you guys see with this setup? Any suggestions to make it better maybe?

*My plan is to add another 2x4 wall with a new footing alongside my existing wall to house the new tank as well as add a recessed niche wall mirror for my vanity area above the sink. So the placement for the toilet drain is correct in the 2nd picture.

* In the 1st picture, the 2" pipe stub above the mainline will eventually connect with my shower drain.

Thanks!

 

[Dan Park]

Oh and upstream from the mainline, I don't need anything else or a cleanout since this bathroom is the end of the mainline. Hence the direct connection to the mainline and not a continuation with a 3" combi to add other stuff upstream