Is Dishwasher Air Gap Necessary

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Written By Elizabeth Anderson

Passionate and experienced foodie, traveler, and lover of all things home-related. Currently writing for a variety of blogs on recipes, cooking hacks, food politics and more!

Yes, a dishwasher air gap is necessary. It prevents dirty water from backing up into your dishwasher and contaminating your dishes.

If you have a dishwasher, you may have noticed a small hole in the side of the machine with a plastic or metal cap. This is called an air gap, and it serves an important purpose. The air gap prevents dirty water from backing up into your dishwasher and contaminating your dishes.

It’s required by most building codes, so if you don’t have one, you should get one installed as soon as possible.

Dishwasher Air Gap Alternative

If you’re in the market for a new dishwasher, you may be wondering if there’s an alternative to the air gap. While the air gap is the most common type of dishwasher installation, there are other options available. One option is to install your dishwasher without an air gap.

This means that your dishwasher will be connected directly to your plumbing. While this might not seem like a big deal, it can actually save you money on your water bill. Additionally, it can also help prevent problems with clogged drains.

Another option is to install a recirculating pump. This type of installation pumps water from your dishwasher back into your sink. This can be a good option if you have hard water, as it can help prevent spots and streaks on your dishes.

However, it’s important to note that this type of installation can be more expensive than an air gap installation. Finally, you could also opt for a portable dishwasher. Portable dishwashers are stand-alone units that don’t require any special installation.

They’re great for small apartments or homes where space is limited. However, they generally don’t have all the features of a full-sized dishwasher and may not clean dishes as well as their larger counterparts. No matter which type of installation you choose, make sure to consult with a professional before making any decisions.

Is Dishwasher Air Gap Necessary


Why Do Some Dishwashers Need an Air Gap?

If you have ever wondered why some dishwashers need an air gap, you are not alone. This is a common question that we get here at the Dishwasher Depot. The short answer is that an air gap is required by code in some areas in order to prevent dirty water from coming back into your dishwasher and contaminating your dishes.

Now, let’s take a closer look at how an air gap works and why it is needed. An air gap is simply a device that creates a physical barrier between your dishwasher’s drain hose and the plumbing under your sink. This barrier prevents contaminated water from flowing back into your dishwasher through the drain hose.

There are two main types of air gaps: internal and external. An internal air gap is built into the dishwasher itself, while an external air gap mounts on the sink or countertop near the dishwasher. External air gaps are more commonly used since they are less expensive and easier to install than internal ones.

In most cases, an air gap is not required by code unless there is evidence that dirty water has contaminated the dishwasher’s clean water supply. However, even if your area does not require an air gap, it is still a good idea to install one as an extra precaution against contamination.

Do New Dishwashers Come With Air Gap?

Yes, new dishwashers typically come with an air gap. This is a small device that helps to prevent dirty water from backing up into the dishwasher. It is usually located near the sink and connects to the dishwasher drain hose.

Which is Better a High Loop Or Air Gap for a Dishwasher?

There are a few factors to consider when deciding which is better for your dishwasher- a high loop or air gap. The first thing to think about is what type of sink you have. If you have a self-rimming sink, then you will need a high loop installation.

If you have an undermount sink, then you can either choose a high loop or air gap installation. The second factor to consider is whether or not your dishwasher has a garbage disposal unit attached. If it does, then you will need an air gap.

This is because the air gap prevents dirty water and food particles from being able to backflow into the dishwasher and potentially clogging the drains. The third factor to think about is aesthetics. Some people prefer the look of an air gap over a high loop, while others find the opposite to be true.

Ultimately, this decision comes down to personal preference. So, which is better- a high loop or air gap for your dishwasher? It really depends on your individual needs and preferences.

Consider the factors mentioned above and make the choice that’s right for you!

Can I Replace Dishwasher Air Gap With Soap Dispenser?

If you’re considering replacing your dishwasher air gap with a soap dispenser, there are a few things you should know first. While it is technically possible to do this, it’s not recommended by most experts. The reason for this is that the air gap is designed to prevent dirty water from backing up into your dishwasher.

If you don’t have an air gap, and dirty water does back up, it could contaminate your soap dispenser (and anything else in the vicinity). So, if you’re set on replacing your dishwasher air gap with a soap dispenser, just be aware of the potential risks involved. Otherwise, stick with the tried-and-true air gap!


If you have a dishwasher, you’ve probably noticed the little plastic dome on the back of the machine. This is called an air gap, and it’s there for a very important reason. An air gap is a small opening that allows water to drain from the dishwasher without siphoning it back up into the machine.

If water is siphoned back into the dishwasher, it can cause problems like flooding or water damage. So, why do you need an air gap? Well, if your dishwasher doesn’t have one, then you run the risk of damaging your machine or even flooding your kitchen!

An air gap is a simple way to protect your investment and keep your kitchen safe.

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