Does the wall connection for the drain need to below the outlet on the disposer?

Does the wall connection for the drain need to below the outlet on the disposer?
Yes! As you can see there's a trap that sets under the unit. This image shows a counter top air gap. We only install high loop air gaps in my area. Regards, Tom

Yes, Yes... otherwise you will have standing water in Garbage Disposer. GD will stink and drain slowly. Also it will eventually corrode your GD interior parts.

ACT we usually hear this question when someone is installing an under mount sink with disposal and runs into troubles. What's your story?