Why does a dishwasher have to drain through the sink plumbing?

• <div><p>Any drain in your house requires a water trap to prevent sewer gases from entering the home. Dishwashers don’t have an internal water trap, so they must use an external P trap. The most convenient P trap for the dishwasher is already in the plumbing under your sink.</p></div>

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Verified Reviews for Dishwasher Installation pros in Glendora, NJ

*The Angi rating for Dishwasher Installation companies in Glendora, NJ is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Dishwasher Installation needs.

*The HomeAdvisor rating for Dishwasher Installation companies in Glendora, NJ is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Dishwasher Installation needs.

Last update on February 14, 2025

Reviewed in February 2025
The technician came out and assessed the issue with leak from dishwasher, but it was not something he could fix, because it was an issue with the motor of the dishwasher. He did fix issue I was having with toilet. So, overall I was pleased with the assessment and work he did. But, I was...
Lange Professional Plumbing LLC
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Reviewed in October 2024
The installers were respectful and professional.
Footprints Floors of Trenton/Camden
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Reviewed in August 2023
Great customer service, They installed a dishwasher, garbage disposal and a new faucet. very friendly and professional! and very affordable! Will be using them for future projects!
Dormann's Custom Plumbing Inc
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Reviewed in June 2023
Dishwasher busted after 4 months. Quaker City showed up 1 day later and replaced the broken part to get it working in less than 30 minutes without even moving the dishwasher. Appreciate the great service!
QUAKER CITY SERVICE CO.
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Reviewed in August 2022
The report is comprehensive, detail oriented. The only downside if I have to say is the home inspector didnâ t run the dishwasher, washer and dryer to see if the equipment work properly. Other than that, everything is great.
Real Estate Inspections
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Reviewed in March 2022
My install was very professional. John & Christian were very friendly & answered all our questions regarding our new dishwasher. My experience started with Craig in the store. He was very knowledgeable about his products & created a comfort level that made it easy to deal with him....
Appliance Werks, LLC
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Reviewed in March 2022
They had a cancelation so I got my dishwasher repaired same day I called. Bert was great and found the nickel size piece of glass in the motor and was done very quickly.
Mr. Appliance of Atlantic & Cape May
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Reviewed in February 2022
Steve was great! Very professional and helped get my difficult dishwasher out of its spot!
Get A Project Completed
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Reviewed in September 2021
Very easy-going and professional. Installed our appliances even though the dishwasher proved to be difficult!
ASAP Home Repair, LLC - Home Facebook
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Reviewed in August 2021
The installers were efficient and clean. Doug was very helpful worth ordering and setting everything up.
Floor Coverings International Cherry Hill
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Top-Rated Dishwasher installation pros in Glendora - Updated Nov 2026

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Dishwasher Installation FAQs, answered by experts

Your dishwasher drains through a hose that attaches to the plumbing below your sink or snakes out the back of your machine. In most cases, you can access one side of the hose from below your sink, as it usually ties into the same drainline that your sink uses. Otherwise, you may need to pull the dishwasher out of the counter to access it.

You can repair minor damage to a dishwasher drain hose with tape designed to handle moisture but it’s probably better to simply replace it. Dishwasher hoses are inexpensive items that, although they require some muscle to change, are best swapped out. You don’t want to find your kitchen has flooded because of a faulty part that usually costs between $10 and $30.

The most common reason for a smelly dishwasher is a dirty dishwasher filter. The filter is responsible for catching food while your machine is running to prevent clogs. Over time, that filter gets more and more filled with food particles. Cleaning your dishwasher filter monthly can keep the smell at bay.

Any drain in your house requires a water trap to prevent sewer gases from entering the home. Dishwashers don’t have an internal water trap, so they must use an external P trap. The most convenient P trap for the dishwasher is already in the plumbing under your sink.

Leaks, poor drainage, failure to start, water not heating, and excessive noise frequently require service.

The Glendora, NJ homeowners’ guide to dishwasher installation services

From average costs to expert advice, get all the answers you need to get your job done.

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