back-to-back toilet installation

Good Day, Plumbing Gurus, I am seeking advice on how to properly drain and vent two back-to-back toilets in a symmetrical bathroom layout under a 4" slab on grade foundation with down-turned footers. This is new construction, I am owner/builder, and am new to plumbing and trying to research and...

I am a realtor and amateur designer ... currently about to tear apart my 2nd floor for a complete remodel ... adding a 2nd bath with the toilet backing up to the existing bathroom's toilet. I have a question regarding wall-hung vs traditional regarding the stack/drain. Here's a summary ... My...