Tip & How-To about Dishwashers

Quickest way to fix a drain issue on a dishwasher

Have you ever noticed water coming out of the top of your sink from the Air-Gap? I have had many service calls where people have had that issues for years and didn't think it was a problem. The purpose of the air-gap is to be an over flow in case your disposal hose gets clogged and a quick clean out.
Please check your air gap at least once a month to be sure there is not any food stuck in the hose. A good percentage of your drain issues will start at the air gap and it could be the only problem. Here are some instructions on how to clean out your air-gap:

  1. Remove the cover
  2. Remove the cap (Some have 2x clips that have to be pinched others have a cap you pull off)
  3. Check the smaller tube it should have a little water and if you see any food debris etc.. clean it out
  4. Replace the cap
Replace the cover and test by running a quick cycle. Another suggestion would be to clean out the disposal tube once a year of any sludge buildup.
Wow you fixed it!
Hope that was helpful and be sure to check back for more quick tips.

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dishwasher not draining


if your washer is installed correct your sink has an "air gap" that could need cleaned ( on sink top next to faucet theres a short stubby silver cap) under this is a plastic cap that unscrews (dont run washer with this off water will come out ) try pouring a bit of water down hole if it is blocked your air gap is plugged this will require a plumber to dissasemble it to clean it off

Feb 19, 2015 | Dishwashers

3 Answers

There are two hoses coming from my Bosch SHE45M06UC dishwasher. One is obviously the drain coming from the back of the unit, and the other is attached to the side looped and not connected to anything. I went online to the Bosch website for a installation manual and it describes this hose as a air venting hose. Does the end attach anywhere or does it just hang loose on the unit. My husband detached it from its original position and thought it was part of the water line. HELP!


Many people realize the dishwasher connects to a little hose on the sink, it is called an air gap. However, many people wonder " The air gap is there to prevent the water from being siphoned out of the dishwasher. When water flows through the drain hose, it creates a suction on the water still in the dishwasher. The air gap, makes a hole for air to get in. That way, the water only leaves the dishwasher when it supposed to, when it is pumped out. Another benefit of an air gap is that if the drain hose becomes clogged, the dishwasher can still pump out the water. Instead of flowing through the hose, as it should, it can flow out the air gap and into the sink.
The dishwasher's drain line usually connects to an air gap mounted at the countertop level on the sink. The drain line continues from the air gap to either the garbage disposer or directly to the sink drain. If the drainage hose between the air gap and the drain is partially or completely blocked, wat

Aug 28, 2008 | Bosch Dishwashers

1 Answer

bad smell coming from bottom - water doesn't completely drain out


Make sure the drain hose is not blocked or pinched.Also check where it drains into your sink pipeing to be sure food isnt blocking the drain way.
Its eather the drainage path is blocked or the pump stoped pumping.
Also, the drain hose must be installed so as to have a high spot higher than the sink drain or the water from your sink will be able to "run down hill" or drain into your dishwasher. Take a look and see!

also It sounds like your dishwasher does not have an air gap. Newer dishwashers come with an air gap installed, but they can be taken out. A quick fix for this is to:

Check the drain line under the kitchen sink. The drain line is supposed to run from the bottom of the cabinet, and run as high in the cabinet as you can get, (up to the bottom of the counter top) then connect the drain. This is called an air gap, and helps keep a little water in the drain line, which will prevent sewer gases from entering your dishwasher, and garbage disposal.

Aug 17, 2010 | Bosch Dishwashers

1 Answer

Water is coming out of air flow gap. I installed a new air-flow gap and all new lines from air flow gap to sink (except the line from dishwasher to air flow gap) and i still have water coming out the air flow gap. This must mean is either the dishwasher itself or the water discharge line from dishwasher to air flow gap. I've had this problem since we purchased our home new in 2005. Any suggestions?


The leak in an air gap is usually caused by a clogged sink discharge line. Most of the time this is connected to the garbage disposal and there is food particulate in the drain hole where the dishwasher drain from the air gap to the garbage disposal connects.

Pull the sink connection hose off and clean the hole thoroughly. You can try testing the dishwasher/ air gap by placing the disconnected hose into a bucket during the pump out period. It should not leak. After this test...reconnect the hose to the sink connection.

If it is NOT connected to the garbage disposal then remove the hose and clean out the hole where the connection is made. This is a common problem and easily resolved by the user.

Thanks for using FixYa.

Kelly .

May 18, 2010 | GE Nautilus 24" Built-in Dishwasher

1 Answer

I get water all over my counter when dishwasher gets rid of water. There is a feature on my sink of which water comes out. This just started...


Since this just started, I would suggest cleaning out the p-trap under your sink. If your sink drains sluggishly without a pump, then your dishwasher will overflow your drain pipes with its pump.
Also, try facing any air gap opening into the sink.
If the pipes are clear, you may need to add a length of pipe between the air gap on the sink and the 'y' connector that the drain lines are connected to. This will help keep any splashing water from 'climbing' out of the sink-top vent. Good luck

Dec 04, 2009 | Dishwashers

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