2017-12/5-12/7 Sink Plumbing

Here are some photos detailing the drain line plumbing for the kitchen sink. I’m no plumber. This was my first attempt at drain plumbing.

It took some thinking to get the drain lines lined up because one tub of the sink is more shallow than the other.
I ended up merging the lines in the center, where a P-trap would be installed. Is this the correct way to do this? I don’t know.
Figuring out the P-trap.
Here’s the final arrangement. The line has to jut out towards the front in order to find a spot where I could run the drain line from this side of the bus to the other, where the grey water tank is installed. The Fresh water tank is going to be installed below this, so there had to be clearance for that as well. It’s no the most efficient use of space under the sink, but it works.
After I installed the sink, I realized that I would need a vent or air admittance valve to help with the draining. Rather than going through the roof, I installed one under the sink.

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