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No air gap device - Dishwashers

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If you are installing a dishwasher as a permanent appliance into cabinetry, drill a hole up near the top of the cabinet ( near the back) and route the drain house thru this hole over to your drain connection.. An air gap is formed by bring this hose up high and looping it down to the drain tie in.. This wil keep some water in the dishwasher below and act as a gas trap so no gases get into or out of the dishwasher.. If you are using a protable dishwasher.. by merely placing the drain hose ( that normally exits near the back/bottom of the dishwasher ) into a sink.. you have formed an air gap in the same manner.. as long as the drain hose is raised up and over a high point in the cabinet and doesn't allow back siphoning of water into the dishwasher.. you are all set.. Hope that helps..

Posted on Aug 31, 2008

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Posted on Jan 02, 2017

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2 Answers

Dishwasher won't drain completely


perhaps it need that air gap device added .we call it a siphon break here .

Sep 06, 2015 | Bosch Dishwashers

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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...


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

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...


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

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There is a horrible smell inside. We've taken the


cycle the dishwasher, and after it fills with water, dump 6 cups of bleach in there and let it contunue. just before it starts to drain, stop it and let it sit for an hour. restart dishwasher and let it cycle thru.

Oct 10, 2009 | Dishwashers

1 Answer

Air gap valve leak for dishwasher


remove the entire drain hose from the air gap and be sure it is clear, also the dishwasher drain should be going to your disposal, if you chose to use the air gap it should be connected from d/w to air gap then to disposal, todays dishwashers dont need an air gap.

Sep 12, 2009 | Dishwashers

1 Answer

Standing water in dishwasher


Check your "air gap". This is the device that sticks above the countertop and prevents any water backup from getting into your dishwasher. The problem may well be a partially clogged air gap.
Remove the decorative cover and there should be a plastic dome that can be removed. Firmly grip the plastic dome and move from side to side while pulling up. Once you get the dome off you will be able to see if it is clogged. This can be done without removing the drain hose from the bottom of the air gap. This solved my problem which was the dishwasher not completely pumping all the water out. After cleaning the air gap it drains properly.

Mar 12, 2009 | Bosch SHV4803 Dishwasher

1 Answer

Dishwasher water comes out of air gap


ur discharge line is to low...try to make a loop

Mar 09, 2009 | Dishwashers

1 Answer

Dishwasher does not drain completely, has standing water after every complete cycle.


  • Some water, usually one to two cups, remaining in the bottom of the tub is normal. However, if water is covering the bottom of the tub, the dishwasher is not draining properly.

  • Check for paper or large objects covering or blocking the sump area in the rear of the tub.

  • Make sure that the right type and amount of detergent is used: Using the wrong type or too much detergent can cause sudsing that can prevent the dishwasher from draining. Only detergent specifically designed for automatic dishwashers such as Electrasol®, Cascade® or Cascade Complete® should be used. If you find suds in the dishwasher.

  • Check disposer plug. If a garbage disposer has been recently installed, it is possible the disposer drain plug was not removed. The drain plug is a plastic piece in the disposer that blocks the hole where the dishwasher hose connects.

    Please consult the Owner's Manual. Download a free copy of the Owners Manual and/or Installation Instructions. In the Installation Instructions, will be the procedure for removal of the drain plug. You may also check with the installer.


  • Be sure the kitchen sink drain is not clogged. The dishwasher typically drains into the kitchen sink drain or a garbage disposer. If the dishwasher drains into a garbage disposer, run the disposer to clear the drain system. Do not put hands into the garbage disposer. Serious injury could result. You should always turn on your garbage disposer prior to running the dishwasher to clean out any food or debris within the drain system.

  • Check drain hose where it connects below the sink for blockage or a kink in the hose. New dishwashers come with a white corrugated drain hose, which should be used. Re-using old, worn out drain hoses may promote kinking and blockage. If it is neccessary to extend the length of the corrugated drain hose, be sure the total length does not exceed 120 inches and the extention used is not kinked or crushed. See your dishwasher installation instructions for details.

  • Check the air gap if one is installed. It could be clogged. An air gap (not part of the dishwasher) is usually located on top of the sink. Some state or local plumbing codes require the use of an air gap between the built-in dishwasher and the drain system of the home. This plumbing device is used to prevent the possibility of back flow into the dishwasher in the event of a clogged drain system. This item is not a part of the dishwasher and, therefore, the dishwasher warranty does not cover costs related to cleaning or repairing a drain air gap.

  • Typical air gaps are easy to inspect and clean. Be sure the dishwasher latch is in the OFF position or unlatched prior to removal of the drain air gap cover. Simply lift off the cover (usually chrome, could plastic) and unscrew or unsnap (depending on type of air gap) the plastic cap below. Remove any material that may have accumulated and replace the plastic cap and chrome cover. This simple procedure should be followed any time the dishwasher fails to drain properly.

    View a short video about cleaning the air gap:
    Play Video

    Sometimes perceived "no drain" problems are not "no drain" problems at all, but back flow of water from the sink or some other device into the dishwasher:

  • If you notice dirty water building up over time in the bottom of the dishwasher and do not have an air gap, make sure you have a high drain loop. A high drain loop is created when the drain hose is makes a loop at least 18 inches above the floor. Usually this is accomplished by attaching the drain hose to the underside of the countertop. Without a high drain loop or air gap, dirty water from the sink can flow into the dishwasher. The high drain loop prevents back flow of water from the drain into the dishwasher if an air gap is not installed. View a short video about a high drain loop:
    Play Video

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1 Answer

Diswasher airlock


By the airlock , you mean the air gap? .If the water is coming out of you air gap that means the hose that connects the air gap to your drain is clogged or your drain itself is clogged.Check the hose that connect the air gap to your drain(or disposer), check air gap and clogged disposer opening

Dec 01, 2007 | Bosch 24 in. SHU66C05 Stainless Steel...

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