How To Fix Dishwasher Air Gap Leaking Under Sink

Do you want to know how to fix the dishwasher air gap leaking under the sink? If yes, then you need to read this article to the end because I will explain how you can do it perfectly without hiring a professional dishwasher to repair it.

Knowing that your dishwasher does more than clean your dishes, you need to maintain your dishwasher regularly.

Draining away wastewater through the available air gap is one of the best methods of maintaining your dishwasher.

You need to know that when your air gap leaks, it shows that there is a problem. 

Many bacteria are in the wastewater, and you need to let it flow back into your dishwasher. Make sure you eliminate that air gap leak.

New Garbage Disposal

If you just had a garbage disposal installed, and your dishwasher is backing up all over the place, the likely cause is the small insert where the hose connects to your garbage disposal.

To solve this problem, you need to remove it at installation, but sometimes it isn’t. Nowhere to go; the wastewater goes everywhere.

You need to disconnect the hose, hold a screwdriver against the insert and tap the end of the screwdriver with a hammer until the insert is pushed into the tank.

Immediately after the blockage is removed, your dishwasher air gap should be able to work perfectly and effectively.


Clogs are also one of the major causes of a dishwasher air gap leaking. 

You need to remove the metal casing from the air gap; now, you must take off the plastic top.

Depending on your dishwasher manufacturer, most of the top plastic dishwashers may unscrew or lift-off after pinching the sides.

Immediately, you have access to the air gap itself; you need to check to see if there’s any material clogging any part of the air gap. If so, remove it with tweezers.

Blowing Clog Away

Do you know that blowing clog away can also solve and fix your dishwasher air gap leaking under the sink?

You can try blowing the clog away if there’s no clog.

All you need to do is place a roll of paper towels over the air gap and blow hard through your end of the tube.

There will be immediate results on how significant the clog is from the air resistance. Hopefully, there will be powerful blasts that will dislodge any clog. Lastly, you can pour hot water down the air gap to deal with particles. 

Snaking Clog Out

You can eliminate a clog in your dishwasher’s air gap by forcing any tool through the pipe. 

It is known that traditional snakes are too big, so you’ll need to use something else.

You can use a long bottle brush that works well or a long cable. Make sure you use the tool through the giant hole at the bottom of the air gap outlet and work it forth and back.

Always be careful not to put too much force as you could puncture the tube, creating an entirely severe problem. 

Vacuuming Clog

Vacuuming Clog is one of the strategies that you can use to fix your dishwasher air gap leaking. Whenever your dishwasher is clogged, vacuum the clog away. 

You need to take wet/dry shop vac and put the hose end on the air gap outlet. Make sure that the switch is turned to suction.

Now you need to fill the sink or disposal area with hot water and turn on the shop vac. Now you need to force the suction to dislodge the clog.

Allow a gallon of water to run through after the clog is cleared, between 30 – 40 seconds.

It would help if you kept your ear cuffs in good working order because it is essential for your dishwasher’s proper functionality and better for your family’s health.

Why Is My Dishwasher Leaking Under The Sink?

There are three places where a leak can cause leaking under the sink.

  1.  Water inlet, the drain, and the seal around the pump.
  2.  Loose or failed hose clamps
  3.  Cracked gaskets or a broken pump

What Is The Most Common Cause Of A Dishwasher Leaking?

These are the most common causes of Bosch dishwasher leaking:

  • Wrong Dishwasher Detergent
  • Cracked Gaskets Or A Broken Pump
  • Improper Alignment
  • Loose Or Failed Hose Clamps
  • Overfilled dishwasher and more. 

You need to fix these problems as soon as you discover them in your dishwasher so that they won’t become a severe problems that will be expensive to fix. 

In Conclusion

Now you know how to fix your dishwasher air gap leaking under the sink and other important unnecessary information you need to know about your dishwasher leaking. 

Leave a Comment