Bathroom layout

[ThomasF]

Hello, I'm looking to get a second opinion on this plumbing layout.

My biggest worry is the venting of the branch, but I've also heard stuff about the toilet shouldn't come last?

Hoping to receive any advice we can. Right now we aren't into the project, we just need to figure out a layout that works because we'll need to eventually build out some walls and cut through the concrete slab.

 

[Terry]

You will either want the toilet downstream, or vent the shower before it hits the main line.
The toilet works best if it enters on a wye fitting. Normally I offset to the side to pick that up, and not vertical. The wye and combo fitting on the vertical take up a lot of space.
And dropping a toilet into a santee is horrible. The waste goes both ways and winds up blocking upstream.

 

[Sponsor]

 

[Reach4]

but I've also heard stuff about the toilet shouldn't come last?

I think it is the other way around. It is usually better to have the toilet last in the drain path.