Originally posted by: TheGizmo
i would make it look more Y like.. the left drain isn't going to drain so well being completely horizontal after the initial fall.
It shouldn't matter because you still can give it 1/4 inch per foot grade if the tail piece on the left is push farther into the slip joint (making it shorter) or in crease the distant of the tail piece on the right.
Depends on where the trap arm outlet is located under the sink that will dictate the orientation of the P-trap
Center outlet will have a horizontal tee (one tail piece on the left of the tee & the other tail piece is on the right).
Outlet directly under one tail piece with have a vertical tee and an additional trap arm pre P-trap run to the second tail piece.
Outlet on one side of both tail pieces would have a 90deg elbow that connect to the P-Trap and a horizontal tee to the first tail piece with one 90deg elbow to the second tail piece.
Trap arm code in layman term ? horizontal run from the stack (drain pipe) to the P-trap including horizontal pipe from P-trap to tail piece under the sink must be no more than 6? in total length. Unless the P-trap & trap arm increase to 2? piping (maximum size allow) to accommodate longer trap arm run to a maximum of 8?.
1.5? piping/P-trap (standard) ? maximum run 6?
2? piping/P-trap ? maximum run 8?