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 standard size of a dishwasher?

• <div><p>A standard <a href="https://www.angi.com/articles/dishwasher-sizes.htm">dishwasher size</a> is 24-by-24-by-35-inch for a built-in unit. The depth and height line up perfectly with most kitchen countertops and cabinet sizes. </p></div>

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Verified Reviews for Dishwasher Installation pros in Walnut Grove, CA

*The Angi rating for Dishwasher Installation companies in Walnut Grove, CA 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 Walnut Grove, CA 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 July 13, 2026

Reviewed in July 2026
River City replaced 2 sets of 30+ year old French doors with Anlin sliding glass doors in July 2026. They were so easy to work with from the initial email quote, to quickly adding requests like a doggy door and key lock to the quote, to scheduling the install. Dimitry and Andry did a beautiful...
River City Windows
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Reviewed in September 2025
Clean & Excellent work & service! Roberto is a very professional hard working young man I received my estimate for the installation of a new kitchen faucet & toilet my current items were 20years old. I went forward with the job and couldn’t be happier he replaced, repaired and added everything...
1207 INDUSTRIES INC
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Reviewed in November 2024
Hired the Luviano Brothers to install washer, dryer and refrigerator in my new home. They arrived on time as promised. They explained exactly what needed to be done. They were very professional and respectful of my home. The job was done faster than what I expected. They cleaned up both areas...
Luviano Brothers Appliance Services
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Reviewed in May 2023
Had a very good experience. He showed up when he said he would and installed the water heater in a timely manner. I highly recommend.
H K & S Plumbing Co.
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Reviewed in April 2023
Living Water, Terry was very informative, knowledgeable and by far the most reasonable system out of all other companies that i inquired for installation of water softener. The install was done professionally and the guys installing were prompt and thorough. I am very happy that i went with...
Living Water Company
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Reviewed in December 2022
Derek came out the same day I called and fixed my dishwasher and refrigerator. Really appreciate the great service.
All Star Appliance Repair
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Reviewed in October 2022
Perfect. Have hired these guys before. They are on time and do really excellent work. Moises and Eloy (the installers this time), installed a new fence and a beautiful double gate. They are ver professional and do excellent work. Would absolutely hire again!
Fantastic Fence
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Reviewed in September 2022
I thought the price was high to install a microwave $300 but it took some work to get it installed. They accomplished the task, and it looks professional.
Appliance Experts, LLC
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Reviewed in April 2022
Jason is the most professional, fairly priced and reliable irrigation service in the valley. I have hired him for install, repair as well as system configuration. Simply the best hire!
Yordy Sprinkler Services - Unlicensed Contractor
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Reviewed in April 2022
The installers were outstanding and knowledgeable with the central heating and air conditioner system. I would recommend highly.
Gilmore Heat Air Solar Contractors
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Dishwasher Installation questions, answered by experts

DIY installation or repair is possible with the right skills and tools, but if not done correctly, it can often lead to water leaks or improper connections.

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.

The correct water temperature for your dishwasher depends on the washing phase. When water enters the machine, it should be around 120 degrees Fahrenheit, but no hotter than 150 degrees. During the wash cycle, the machine will heat the water to between 130 and 140 degrees. If your dishwasher has a sanitizing cycle, the water can reach a temperature of up to 180 degrees.

To create a siphon break and remove any chance of dirty sink water or water that backs up into the sink from getting into your dishwasher, your dishwasher drain hose needs to have a high loop or an air gap device as part of its installation. All building codes require at least a high loop. In many places, it’s necessary to install an air gap device to meet the code.

A standard dishwasher size is 24-by-24-by-35-inch for a built-in unit. The depth and height line up perfectly with most kitchen countertops and cabinet sizes.

The Walnut Grove, CA homeowners’ guide to dishwasher installation services

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

See all articles

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