The existing shower drain line looks like picture 1.
Is the vertical pipe portion on the right side legal? Shouldn't the waste line be only horizontal until it hits the vent stack?
If I'm right, should I redo the pipes to look like picture 2?
I'm concerned with my solution because the P-trap riser is going to come down quite a bit (~2 feet). In addition, I'm going to have a horizontal pipe midway down the ceiling to the floor. I might hit or accidently run into them!