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 Morongo Valley, CA

*The Angi rating for Dishwasher Installation companies in Morongo Valley, 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 Morongo Valley, 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 14, 2026

Reviewed in July 2026
Marcos came on time and he did a great job fixing several interior doors and installing new doorknobs. He also rehung a closet door. He was very polite and efficient and cleaned up beautifully afterwards. I was very happy with the job he did , and would definitely hire him again. Sue R.
MRC Residential
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Reviewed in January 2026
Michael was very informative during the walkthrough helping us pick the right unit. The team came in the very next day (the day before Christmas!) and installed the heater right away. Great follow up after the installation.
Purrfect Pools and Construction
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Reviewed in March 2025
I contacted 3 pool heater installers two of whom were contenders. CLEARLY was straightforward and professional with his client approach and quote. I hired CLEARLY based upon his professional approach and assumption that I was not ignorant of what I wanted in terms of heater brand name and...
Clearly the Best Pool Service
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Reviewed in November 2024
Very professional & very quick. I would definitely hire Martin again. The quartz countertops he installed in the house looks wonderful.
A & J Marble Dreams
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Reviewed in July 2024
I asked for a fence to be installed. He installed very quickly and efficiently for a good price. I will definitely be utilizing his s ervices again for future projects.His workmanship speaks for itself
Geovani Construction
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Reviewed in September 2023
The did the install and the new heater system install in one day and clean up everything before they left. Great customer service from Claudia to get me a great job and price.
N.R.G Heating and Air Conditioning, Inc.
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Reviewed in September 2023
The installer Wayne was awesome! He did exceptional work and was a pleasure to work with. Highly recommended
DP Door Pros, Inc.
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Reviewed in December 2022
He was very knowledgeable and cleaned up after the installation
Proelco
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Reviewed in September 2021
Rigo and his crew remodeled both of our bathrooms including tile painting drywall plumbing and installed cabinets and sinks along with the bathtub and a new shower. All the work was completed on time at their agreed cost the jobs turned out fantastic. I would highly recommend Rigo and his crew...
KROMAS PAINTING INC
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Reviewed in May 2021
The sales rep was low-key and helpful. The installers were efficient and neat. They all were respectful of the property and kind toward our family members on installation day.
Empire Today - Los Angeles
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Dishwasher Installation questions, answered by experts

The average cost to repair a dishwasher that’s leaking is $200, but your total will depend on the underlying problem. Having a professional replace a faulty door gasket or a gasket in a supply line could cost as little as $50, while replacing a leaking dishwasher pump could total as much as $600.

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.

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.

Yes, if your filter is damaged or simply too debris-filled to be of use, replace it with a new component. Check the instruction manual that accompanied the dishwasher for information as to the specific part. There are many online marketplaces that sell these parts, but perform due diligence to ensure you buy the right one.

Installation includes leveling the unit, connecting water and electrical lines, securing the unit, and testing for function and leaks.

The Morongo Valley, CA 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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