Most Common Installation Problems in Dishwasher

The most common problem in the Dishwasher comes from the incorrect installation of drain pipes. But it is straightforward to apply. In the picture that will be given, all the problems related to plumbing have been solved. Let’s start now!

Dishwasher Connection Guide

Wrong side of the trap

The first is the problem that the drain is connected with a side of the sewer trap. The water is always sitting at the bottom of the P-Trap, and that is why it keeps away the gases coming from the sewerage line. Never connect the dishwasher drain after a P-trap. Always connect it before a P-trap, as has been added here. Even after proper installation, the sewer gases have so much power that it can reappear in the dishwasher. The diagram below will show you the correct way to install it.

Drain Connection Drain Diagram

No High Loop

Look at the diagram above, the dishwasher’s drain is making a high loop under the kitchen sink. This little thing is essential to install a Dishwasher correctly. That’s what the companies that make Dishwashers say that there should be a high loop in the kitchen drain. Instead, put it higher as much as you can. Another way is to install an air gap above the kitchen sink. I’m wondering why anyone would do that when they don’t need to. While in some countries, people say that the air gap is significant. There is no such thing. An air gap is not necessary if your kitchen sink has given a high loop.







Although the new dishwasher comes with a drain that is wrapped around its side, but still, it is necessary to take a guide from the installation manual to give a high loop under the kitchen sink.

Integral Loop of dishwasher

I’ve heard many reasons why people need an extra loop under the sink for the dishwasher. So, I decided that I will contact the Dishwasher’s makers, and I’ll ask them why the high loop is important. I sent emails to eight companies to find out.

It would be best if you had a high loop in the drain of your dishwashers, and this is written in the installation instructions. So, tell me what its purpose is? And what about the high-loop drain that comes with the dishwasher? It can’t do the same thing? Thank you for the guidance in this matter.

Here are some answers I got from these companies.

Kenmore: People who provide local plumbing services install the line according to your area. This is stated under Section 807.4 of the Plumbing Code. “No dishwashing machine can be connected to a sewer or food disposal without an air gap. The air gap sink must be installed with the flood level or above the flood level. Anything too high or stuck in the standpipe airbrake.

GE: If you do not use an air gap, it is important to have a high loop in the drain pipe. Doing this will prevent the water from returning to the dishwasher.

Bosch: The high loop in the dishwasher drain prevents water from coming back. If you do not leave the high loop in the drain hose or put it horizontally, the water will return to the Dishwasher.

Viking: We checked the dishwashers and found out that a high loop is essential for proper drainage. We’ve also seen people who don’t leave a high loop in their drain, and then these people have to face the problem of returning water.

Maytag: Even a month later, there was no response.

Whirlpool: Even a month later, there was no response.

Amana: Even a month later, there was no response.

Last Words

It is vital to give a high loop in the drain, so you don’t have to endure the water coming back later!

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