Well, the past few weeks, the air gap was overflowing into the sink whenever we ran the dishwasher. Naturally, my wife was concerned about it and wanted the problem fixed. Thanks to the wonders of the internet and various DIY sites and videos on YouTube, I now understand how these things work, and what usually goes wrong with them.
The good news is that the air gap itself is a very simple device, mechanically. There are no moving parts whatsoever.
|Dishwasher Air Gap|
In my case, it was a build-up of gunk. The link was a straight shot from my air gap to my disposal with no kinks or dips (it was "downhill all the way"). I removed the hose and upon visual inspection I could only see a pin prick of light through one end. I flushed the hose with water from my outside hose. I didn't bother washing it out with soap or other cleaners. Once it was nice and clear, I hooked it back up to the air gap and the disposal.
I haven't run a load through the dishwasher since I fixed it, but I'm fairly confident my issue has been resolved.
Oh, the number reason for the outflow device to overflow? That would be an incorrect installation of your garbage disposal. There is a nipple on the garbage disposal for your dishwasher drain line. Well, since not everybody has a dishwasher, the inlet hole is covered with a knockout plug. If you don't remove that knockout plug, obviously there's no where for the water to go. I almost made that mistake myself when I replaced our garbage disposal a year ago.
The LORD bless you and keep you; the LORD make his face to shine upon you and be gracious to you; the LORD lift up his countenance upon you and give you peace.
Numbers 6:24-26 (ESV)