Bosch Dishwasher Air Gap: A Tiny Friend Keeping Messes Away

Have you ever wondered what that small, cylindrical device attached to the sink near your Bosch dishwasher is? 

That’s the air gap! It might seem small, but it’s a big deal for your kitchen’s safety and your dishwasher’s performance. 

No worries if you’re not sure what it does or if you absolutely must have it—I’ve got your back! 

I’ll give you all the info and clear up any doubts you’ve got about the bosch dishwasher air gap. 

Let’s dive in!

Does Bosch Dishwasher Need an Air Gap?

Does Bosch Dishwasher Need an Air Gap

When you’re installing a Bosch dishwasher, you definitely need an air gap or something similar. Why? 

Well, without an air gap, you might run into trouble with your dishwasher’s drainage and dirty water sneaking back in.

An air gap keeps the dishwasher’s drain separate from your plumbing, so you don’t end up with grimy water on your freshly cleaned dishes. 

And trust me, you don’t want that! Without an air gap, you’ll also struggle with the dishwasher not draining properly. 

Plus, don’t forget to follow the local plumbing rules—they often say you must have an air gap. 

It’s not just about keeping things working smoothly, but it also keeps you out of legal messes. 

So, make sure you’ve got an air gap or an approved alternative to keep your dishwasher doing its job and your dishes squeaky clean. 

Does Bosch Dishwasher Have a Built-In Air Gap?

Does Bosch Dishwasher Have a Built In Air Gap

Nope, Bosch dishwashers usually don’t come with a fancy built-in air gap. You need to get one yourself. 

In fact, depending on where you live, local plumbing codes might even demand its installation. 

If you had one installed, you might be wondering, “What is the Bosch dishwasher air gap location?” Well, it’s usually positioned at the back of the sink. 

Look for a little hood or cylinder that acts like a barrier between the dishwasher drain line and the kitchen sink drain.

How Does an Air Gap Work in Dishwashers?

Now, let’s talk about how this air gap thing actually works in dishwashers. 

When your dishwasher gets rid of the water, it flows through a hose into the air gap.

From there, the water goes into the sink drain. This setup creates a physical gap or air pocket between the dishwasher drain line and the sink drain.

It ensures that the dirty water doesn’t mix with the clean water supply. 

Bosch Dishwasher Air Gap Alternative

Bosch Dishwasher Air Gap Alternative

While Bosch dishwashers don’t typically have a built-in air gap, they offer a handy alternative called a High Loop System. 

In this setup, the dishwasher drain hose is raised and attached to the underside of the sink or countertop, creating a high loop. 

Gravity helps prevent drain water from flowing back into the dishwasher.

The high loop system does the same job as an air gap by stopping cross-contamination and backflow. 

But remember to check local plumbing codes to make sure a high loop is an accepted alternative in your area.

High Loop vs. Air Gap: Which is Better?

Both the high loop and air gap methods are acceptable for complying with plumbing codes and preventing backflow in a dishwasher. 

The choice between them depends on your local regulations and personal preference.

The air gap is the traditional solution that provides a physical barrier, ensuring that dirty sink water doesn’t enter the dishwasher. 

If your plumbing codes require an air gap, follow the guidelines and install one accordingly.

On the other hand, the high loop system offers a convenient alternative that’s considered equally effective by many. 

The elevated position of the drain hose, along with gravity, prevents backflow. 

However, it’s still a good idea to consult a licensed plumber or inspector to ensure the high loop complies with local plumbing codes.

Bosch Dishwasher E24 Air Gap Issue and Solution

Bosch Dishwasher E24 Air Gap Issue and Solution

Sometimes, a Bosch dishwasher may display an E24 error code, indicating a drainage problem. 

This issue could be related to either the air gap or high loop system. 

If your dishwasher isn’t draining properly and you see the E24 error, try the following steps:

Air Gap

  1. If your Bosch dishwasher has an air gap, check for blockages or clogs. 
  2. Remove any debris or residue that may be blocking the water flow.
  3. The issue should be solved afterwards.

High Loop

  1. If your dishwasher relies on a high loop system, ensure the drain hose is elevated.
  2. Inspect it further and ensure it’s securely attached. 
  3. Look for any kinks or restrictions in the hose that could be causing drainage issues.

By addressing any potential blockages in the air gap or high loop system, you have a good chance of resolving the E24 error and restoring proper drainage in your Bosch dishwasher. 

If the issue persists, consult the dishwasher’s user manual or contact Bosch customer support for further assistance.


What size is a dishwasher air gap?

A dishwasher air gap is typically around 2 to 3 inches in height.

Do all Bosch dishwashers have leak protection?

Yes, all Bosch dishwashers have a leak protection system. It automatically shuts off the dishwasher if it detects leaks or water accumulation to prevent flooding or water damage.

Does Bosch need a high loop?

Bosch dishwashers offer a high loop system as an alternative to an air gap. The high loop raises the dishwasher drain hose to a higher position to prevent backflow.

What is the vent for inside a Bosch dishwasher?

The vent inside a Bosch dishwasher allows proper air circulation during the drying phase, helping to remove moisture and improve drying performance.

Do you need an air gap for the dishwasher if you don’t have a garbage disposal?

Local plumbing codes determine whether you need an air gap for your dishwasher, regardless of having a garbage disposal or not. Some areas require it to prevent backflow and ensure proper drainage.

Why do plumbing codes require air gaps?

Plumbing codes require air gaps as a safety measure to prevent cross-contamination and backflow. Air gaps ensure that dirty water from the sink or sewer system cannot flow back into the dishwasher, protecting the clean water supply from contamination.

Final Thoughts

So, the next time you spot that unassuming device near your sink, remember that it’s more than just a small accessory— it keeps your kitchen from getting messed up by potential backflow and also keeps things hygienic. 

And to top that off, it’s easy to fix up if things go wrong, too, because of how simple it is. 

Take good care of your bosch dishwasher air gap and make sure to check it every once in a while for debris.

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