Double Sink + Disposal Drain Routing
What are the rules of thumb for undersink drain routing from the sinkdrain and disposal to the trap in this configuration?
Left basin has a disposal with DW connected to DW inlet via a high loop (no airgap).
The trap is not directly underneath either sink, necessitating a center-outlet configuration.
I am trying to route around various undersink mounted trashcans, shelves, and such without 1)violating code or 2)causing slow draining or backing up. With enough elbows, an infinite number of paths are possible :^)
This is what I've got so far:
1) slope all horizontal pipes slightly downward
2) use a baffled T, not a Y
3) 1 1/2" pipe at minimum
4) horizontal section coming from (downward) disposal outlet must be below manufacturer specified level on disposal.
5) Minimize bends
6) flow may only be downwards or horizontal (obviously)
While I'd appreciate any input, I've got two primary questions:
Will I run into slow draining if I drain the right sink immediately into an elbow (then run horizontally before descending via another elbow and pipe into the baffled T) versus longer vertical drop first and then horizontal?
Does it matter how the T is oriented? (ie sink drain routed into "top" of T and disposal outlet into side of T versus sink into side and disposal outlet into top). The allowable relative heights of the horizontal segments in a center-outlet configuration are my question: should the sink horizontal outflow be above the disposal horizontal outflow or visa versus or doesn't it matter?