Pop-up locations - underslab

[magnethead]

Hi There,
I'm putting some sleeves in an ICF wall tomorrow, and I'd like some advice if possible on the way to go with the plumbing here.

I have a toilet, sink and shower tray in this bathroom, does it make sense to pipe all these straight out the wall, or connect them to the toilet run in the centre under the structural slab and only feed one pipe out the wall?

I would be thinking of making this connection under the slab. See diagram below...... It might just be easier to run them out through the wall though, they would still be underground at this level.

What do you think? Thanks

[PeterW]

Run them out separately but don’t forget the further toward the manhole they go, the deeper they need to be .. don’t forget the falls ..!

[magnethead]

Thanks