Rough Drain Questions

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Dussell

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Hi,

I will be building my own house soon and I will be doing some trades plumbing being one. I want to have a strategy for the under slab and main stack before i get started. I have a some(several) questions regarding this

1. The wall behind the bathroom will have a "thickened slab" Do pipes withing 12" and penetrations through this need to be sleeved?
2. Any thoughts on a basic strategy for the under slab plumbing. Should I run the plumbing out the left side of the bathroom or under the exercise room and maybe at a 45 to the left? If I run it out the left side of the bathroom. Where to I put the vent for the bathtub?
3.Should I join the upstairs plumbing with the downstairs underslab or outside the house? It will need to be 4" once joined.

Notes: The septic tank will be off the back left corner of the house, NC plumbing code

Thanks for any replies.

Russell
Downstairs Bathroom.jpg
 
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