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>

Are dishwashers more energy-efficient than handwashing?

• <div><p>The answer is a resounding yes, as <a href="https://www.angi.com/articles/hand-washing-vs-dishwasher-cost.htm">dishwashers save significant water</a> and energy compared to washing dishes by hand. The difference is so drastic in fact that those who use energy-efficient dishwashers can expect savings of over <b>$450</b> <b>per year</b>. This is because dishwashers use less water, they wash at a higher temperature than a hand rinse, and you don’t need to rinse them after washing. New dishwashers use around 4 gallons per load, whereas washing by hand can use up to 2 gallons per minute.</p></div>

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4.5
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49
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Verified Reviews for Dishwasher Installation pros in Eldridge, CA

*The Angi rating for Dishwasher Installation companies in Eldridge, 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 Eldridge, 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 November 03, 2025

Reviewed in November 2025
The installation process was amazing. We walked the site, which involved two different types of fencing and several gates. The installer understood my concerns and he asked questions. Best of all, they were done in just a few hours! Highly recommended!
Ergeon
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Reviewed in April 2025
My experience was very positive. The installers arrived on time and installed my new thermostat without any problems. They made sure the new equipment worked properly.
Best Chance Heating and Cooling
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Reviewed in January 2025
I liked the work that was done, taking out wood flooring in the kitchen and installing vinyl planks. It was done in fits and starts - there was a leak from the dishwasher which warped the wood and left the sub-flooring wet so it needed about a week with a fan running all the time to dry out. ...
McD's Flooring Installs
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Reviewed in February 2024
JDR did an excellent job on our kitchen remodel, installing cabinets, appliances, our sink and disposal, and light fixtures. They ensured the final details were complete after the major work was done, which had been our biggest challenge with other companies in the past
JDR Development Company, Inc.
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Reviewed in February 2024
Absolutely thrilled by the service received by Aurelio and his wonderful company, Northbound Plumbing. The issue for his visit was water gushing onto the countertop from the air gap when running the dishwasher. Aurelio cleared the blockage causing it, something a previous 5-star company was...
Northbound Plumbing
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Reviewed in February 2024
It was a dishwasher install. There were some pipe issues that needed to be repaired first. Marty was able to troubleshoot the problem the previous DW installer could not do. He was on time, efficient and did a great job cleaning up. He is a friendly guy and explained everything to me in...
MCFLY PLUMBING
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Reviewed in September 2023
Great company. Installed my doors quickly.
Elevated Garage Doors, Inc.
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Reviewed in October 2022
On time, replaced pocket door, installed hot water return line, very good work, and completed on time.
AMS Renovation and Services-Unlicensed Contractor
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Reviewed in December 2021
Steve was wonderful to work with. He was polite and very focused on his work. He used his creative problem solving skills for this installation as the manufacturer omitted a part which Steve found a solution for in order to complete the installation without any problem with safety of use. I...
Weaver Electric
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Reviewed in November 2021
The installers were very professional and dealt well with a very difficult furnace location. Alex was particularly knowledgeable in getting the rather complicated thermostat system up and running.
Enviro Heating & Air Conditioning, Inc.
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Dishwasher Installation questions, answered by experts

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.

You should follow the instructions listed on the detergent packaging and in your dishwasher user manual. Often, this means inserting the tablet or pod into the detergent dispenser (and not in the bottom of the dishwasher). If you put the pod anywhere else, it might dissolve too early in the cycle and fail to clean your dishes properly.

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 answer is a resounding yes, as dishwashers save significant water and energy compared to washing dishes by hand. The difference is so drastic in fact that those who use energy-efficient dishwashers can expect savings of over $450 per year. This is because dishwashers use less water, they wash at a higher temperature than a hand rinse, and you don’t need to rinse them after washing. New dishwashers use around 4 gallons per load, whereas washing by hand can use up to 2 gallons per minute.

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.

The Eldridge, 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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