back to back restrooms

First time I'm using this forum... I am doing a remodel with approximately back to back kitchen and lavatory sinks. The 2" drain and vent pipe is offset with a 2"x2"x2" sanitary tee to attach the 2" horizontal drain line to. I am considering attaching a 2"x 1 1/2" x 1 1/2" sanitary tee with a 1...

Hello all, First time I'm using this forum... I am doing a remodel with approximately back to back kitchen and lavatory sinks. The 2" drain and vent pipe is offset and I have a 2"x2"x2" sanitary tee to attach the 2" horizontal drain line to. I am considering attaching a 2"x 1 1/2" x 1 1/2"...

I am doing a remodel and need to purchase toilets that will function back-to-back. I would like to get TOTO brand toilets. Wondering if the Drake model or the Ultramax model are good choices.

I'm working with larger drain pipes under a slab and want to keep everything as simple as possible while having a bunch of fixtures. Attached is a drawing using a sweeping wye for each fixture. The fixtures are directly above the main branch and I'd like to sweep directly into the top of the...