Kitchen remodel, sink drain rework
I am remodeling my kitchen. the sink drain clogged up several months ago and i spent several days getting it unclogged. After many efforts starting with the plunger, liquid plumber and finally ending with getting into the crawl space, unscrewing the clean out (phew!), and running a snake down the line (and many things in between) I got it open. However, in getting under the house, I found that the builders put in 5 90 degree elbows from the p trap to the straight line drain. no wonder it was clogged. The reason is that the A/C vent opened up right under the p trap (amazing). So where the pvc would come out of the wall in the crawl space was blocked by the ducting and vent. So the 5 elbows were the effort to route the drain away from the vent and then back to the main line. I am wanting to fix that and plan on shortening the AC duct work to give me a better drain structure. Should be a straight forward effort of running the pvc from the p trap into the wall, 90 elbow down, 90 elbow out into the crawl space and connect to the main line.
Anybody see something I am missing. Is there any plumbing reason I shouldn't do this? I am also relocating my dishwasher and will be including that in the rework. I am on a septic tank and do not have a garbage disposal.