How Dishwasher Drains: Your Comprehensive Guide

If you’re curious about “how dishwasher drains,” you’ve arrived at the right place. We’ll walk you through the process, step by step, and by the end of this guide, you’ll have a comprehensive understanding of how a dishwasher drains. Let’s demystify the process together.

How Dishwasher Drains
From by Wendelin Jacober

What You Need to Know About How a Dishwasher Drains

Before diving into the process, it’s helpful to know why understanding how a dishwasher drains is essential. Proper drainage ensures your dishes come out spotless and the machine operates optimally. Any hitch in the draining process can lead to malfunctions or unclean dishes.

Components Involved in How Dishwasher Drains

The primary components involved in how your dishwasher drains are the pump, the drain hose, and the sink drain or garbage disposal, depending on your setup.

The Pump

The pump is the heart of the drainage system, responsible for forcing the water out of the dishwasher and into the drain hose.

The Drain Hose

The drain hose carries the water from the pump to your home’s drainage system, usually located under your sink.

The Sink Drain or Garbage Disposal

Once through the drain hose, the water ends up in your sink drain or garbage disposal, where it is finally disposed of.

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For more articles on dishwasher problems & solutions, click here: Dishwasher Problems and Solutions: Your Ultimate Guide to Hassle-free Dishwashing

Understanding How a Dishwasher Drains

Now that you’re familiar with the components, let’s examine how does a dishwasher drain.

Step 1: Dishwasher Completes Its Cycle

After your dishwasher has completed its wash cycle, the pump activates to expel the dirty water. The pump is located at the bottom of your dishwasher, under the spray arm and filter.

Step 2: Water Flows Into the Drain Hose

The water, now forced by the pump, flows into the drain hose. The drain hose is usually a flexible tube running from the dishwasher to the drainage point under your sink.

Step 3: Water Travels to the Sink Drain or Garbage Disposal

The water travels through the drain hose and into your home’s drainage system. If you have a garbage disposal, the dishwasher usually drains into it; otherwise, it drains directly into the sink drain.

Step 4: Water Is Disposed Of

Finally, the water is disposed of into your home’s wastewater system through the sink drain or garbage disposal. This marks the completion of the draining process of your dishwasher.


Understanding how dishwasher drains can empower you to troubleshoot potential issues or perform routine maintenance on your machine. Remember, each dishwasher model may have slight variations, so always refer to your user manual for specifics.