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What is a Dishwasher Air Gap? Do I Need One?

By September 10, 2020November 29th, 2020No Comments

Did you know? Many dishwashers don’t have built-in backflow prevention. Backflow happens when dirty, contaminated water is mixed back into the clean water supply. Why is this important? Backflow can lead to contamination inside your dishwasher and create an environment that can lead to bad odors and health issues. This is where dishwasher air gaps come in.

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What does a dishwasher air gap do?

A dishwasher air gap prevents dirty sink drain water from funneling into your dishwasher which can contaminate your dishes. In some areas, you are required to have a dishwasher air gap or some form of backflow prevention.

Dishwasher air gap will keep your dishwasher running optimally and your dishes in top-top shape.

Do dishwashers come with air gap?

Surprisingly, many dishwashers do not come with built-in backflow prevention or an air gap. However, some dishwashers have a drain hose that is looped upward and attached to the bottom of the countertop. Before ordering and installing a dishwasher air gap, consult your owner’s manual.

How much does it cost to install an air gap for dishwasher?

The cost of dishwasher air gap installation can vary. There are tons of resources out there that can teach you how to install a dishwasher air gap yourself, but we recommend contacting a plumbing professional to have it properly installed.

Should water come out of the air gap?

Occasionally air gaps linking water may mean you need to run the garbage disposal. When an air gap is leaking water, there could be a kink or blockage in the tube of the air gap. You can easily fix this by cleaning the air gap, checking the drain line below the sink or pulling off the air gap, and checking the opening for obstructions.

We offer a solid selection of durable and affordable dishwasher air gaps that will help eliminate backflow issues and help you create a healthy, well-functioning dishwasher.

Pro Flo Dishwasher Air Gap

The Pro Flo PFGAPCP Air Gap will keep your dishwasher running optimally and your dishes clean! This affordable dishwasher air gap features a plastic body, a chrome-plated ploy cap, and a capacity of at least 5 gallons per minute.



Pro Flo PFGAPCP Dishwasher Air Gap

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Kohler Dishwasher Air Gap
The Kohler K9110-CP Dishwasher Air Gap will keep your dishes optimally clean and your dishwasher running efficiently. It features a plastic body, a durable solid brass cap, a polished chrome finish, and a corrosion and tarnish-resistant coating.



Kohler K9110-CP Dishwasher Air Gap

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Kohler Dishwasher Air Gap
The Kohler K9110-VS Air Gap will help keep your kitchen sink pipes clean and prevent the backflow of wastewater into your dishwasher. It features a plastic body, a solid brass cover for durability and reliability, and a valve cover and body. Plus, it comes with corrosion and tarnish-resistant coating to make it last for years to come.


Kohler K9110-VS Air Gap

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Do you have any questions about dishwasher air gaps? Let us know in the comments below! is a replacement water and air filter company located in the United States. The views and opinions contained herein are solely those of the original author and do not represent Eco Blue Life or its affiliates. This article was originally published on  
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