Yep - I was able to find that name on the interwebs. I haven't found anyplace that sells it online. I'll take a drive over to my local supply house and see if they carry it. Does anyone know where to buy one online?
This is what the outside looks like:
If I could easily connect the dishwasher to the sink drain I wouldn't be researching this. Our design has the sink and dishwasher on adjacent walls, separated by a corner cabinet so there's about six feet of wall between the sink and dishwasher.
Even if our code doesn't require an air gap (and I doubt that it does because I never see one above the counter in anybody's kitchen around here) I can see the logic of having one. It would have to be one heck of a backup as the kitchen is on the second floor of a split level and there are fixtures in the basement and on the first floor. Still, I eat on the dishes that come out of that dishwasher and if I can prevent contaminating the dishwasher for a couple of bucks and a few extra minutes of install time, its worth it to me.