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>

What is the most common cause for a dishwasher not to drain?

• <div><p>If your dishwasher isn’t draining, some common causes include a clogged drain filter, drain hose, or air gap. Also, if you have a garbage disposal, a clog in the disposal can back up your dishwasher since they share plumbing, as can a clog in your kitchen sink’s plumbing. A handy DIYer may be able to figure out <a href="https://www.angi.com/articles/how-to-unclog-dishwasher.htm">how to unclog a dishwasher,</a> but you may need to call in a plumber if you can’t locate and clear the clog yourself.</p></div>

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Verified Reviews for Dishwasher Installation pros in Lakeside, VA

*The Angi rating for Dishwasher Installation companies in Lakeside, VA 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 Lakeside, VA 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 September 03, 2025

Reviewed in September 2025
Mr. Reynolds was very professional and thorough. He was a problem solver and spent the time to troubleshoot and find the problem. He fixed my dishwasher without having to buy additional parts and incur additional charges. I will definitely be using him again.
Reynolds Appliance Repair LLC
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Reviewed in January 2025
Juan installed a new bathroom mirror and faucet for me. He was fast and tidy. Will be using him for future updates!
Juan Handy
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Reviewed in April 2024
The door install looks great! I would recommend this company!
Home Genius Exteriors
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Reviewed in January 2024
Pete was amazing! He came and gave me an estimate and let me know all of the work/supplies that would need to be done prior to him installing the dishwasher. He was prompt, skilled, knowledgable, and personable!
OCD Handy Services LLC
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Reviewed in November 2023
Dan did a great job. My dishwasher had come loose from its moorings, and Dan diagnosed the reason for the problem and completed the reattachment in short order. He was friendly and professional, and I would not hesitate to call him again!
Duke Techs
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Reviewed in February 2023
Technicians were very professional. In addition, they came out to fix my dishwasher the same day I called, which was an unexpected bonus. And they resolved the problem with my dishwasher for a reasonable amount of money. It was a good experience.
Professional Appliance Repair
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Reviewed in October 2022
This is a very efficient company. Scott Ogburn put the job together and everything was done in a timely fashion. George did the installation and is a true craftsman. Weare happy you recommended them.
Footprints Floors of Virginia
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Reviewed in July 2021
The installation was done and completed in a timely and professional manner.
Classic Granite and Marble
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Reviewed in November 2020
Matt worked hard to get the dishwasher we wanted installed in our existing kitchen. We had another business come out for a quote and they said the project wasn't possible, but Matt did it! We were absolutely thrilled with his professionalism, persistence, and obvious care in his work and will...
Custom Built and Painted
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Dishwasher Installation questions, answered by experts

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.

Yes, vinegar is an excellent homemade solution to clean a dishwasher. Its acidity will cut through any buildup, while its natural deodorizing capabilities will take care of any nasty smells.

Professional repair is advisable for electrical issues, refrigerant leaks, or unfamiliar problems. Technicians can accurately diagnose and fix such problems, ensuring safety and appliance longevity.

If your dishwasher isn’t draining, some common causes include a clogged drain filter, drain hose, or air gap. Also, if you have a garbage disposal, a clog in the disposal can back up your dishwasher since they share plumbing, as can a clog in your kitchen sink’s plumbing. A handy DIYer may be able to figure out how to unclog a dishwasher, but you may need to call in a plumber if you can’t locate and clear the clog yourself.

It might be time to buy a new dishwasher for your kitchen if you consistently notice a significant amount of water left over after a cycle, indicating potential drainage issues that are becoming persistent or costly to fix. Visible rust, especially on the interior tub or racks, suggests internal corrosion that will likely worsen over time and can compromise cleaning performance. Additionally, if your dishes are coming out excessively hot after the drying cycle, it could point to a malfunctioning heating element or thermostat, which can be an energy inefficiency and a potential safety concern, making replacement a feasible choice.

The Lakeside, VA 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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