Can you tell me if this setup right below the right side of the kitchen sink is a normal setup? I’m thinking it should have a straight piece coming down first. Also, would it require a slip joint washer?
from the looks of the picture you have an s trap with out a vent
a vent is required so the p trap water seal is not syphoned out of the trap.
if your bathroom smells like you farted . the problem is no vent