The dishwasher tubes that I bought are very long. The one going from the dishwasher to the air gap (white) drapes on the ground. The one going from the air gap to the garbage disposal (gray) makes a 360 degree loop. Does this matter? My knowledge of physics is not so good, but I vaguely remember that only the vertical height difference between the end points of the tubes mattered.
Update: I tested turning on the dishwasher. Water was spewing out of the air gap. This may indicate the loops are blocking water flow or something else is wrong with my setup.