I work 8-5, so yes, I realize apple is open during these hours. I know they are open until roughly 6 or 7pm. It's the after 5pm hours, and sat/sun hours I'm interested in. So I can plan my week.
An air gap for a dishwasher is a requirement set forth by local plumbing codes. It is a device designed to ensure water flows only in the right direction during the dishwasher cycle. As a dishwasher operates, hot water flows in from the sink's hot water connection.
The air gap from the dishwasher drain has NOTHING to do with supply water. There is NO way the water from the dishwasher could get into the supply line. The fill opening is usually half way up the side and there is no way that water could get that high.f the drain becomes clogged, the air gap will discharged the dishwasher water into the sink. I haven't measured the capacity of my sink, but I am betting it isn't near the 13 gallons or so that the dishwasher uses.