appropriate layout of sink and shower

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elevationbishop

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I'm wanting to tie both a vanity sink drain (2") and Shower drain (2") together before entering the main septic line (4").

Can I connect the shower P trap to a vertical drain that then connects to the sink drain that ties into the septic?

I also want to vent the whole system using the Kitchen sink vent that is on the opposite side of the wall from where I've built out the new bathroom.

I'm pretty sure it's a 5 fixture unit system so a 2" vent pipe should be adequate, correct?
 

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