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 all dishwashers 60cm wide?

• <div><p>Not all dishwashers are 60cm wide, but that tends to be the most common size. 60cm translates into roughly 24 inches, with most home dishwashers being between 22 and 24 inches wide. There aren’t metrics available but it’s been our experience that over 90% of household dishwashers in North America are around 24 inches wide by 24 inches tall.</p></div>

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Verified Reviews for Dishwasher Installation pros in Belton, MO

*The Angi rating for Dishwasher Installation companies in Belton, MO 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 Belton, MO 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 June 16, 2026

Reviewed in June 2026
Based on the recommendations, we elected to replace our dishwasher rather than repair
Able Appliance Repair
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Reviewed in August 2025
Very professional! Quick response time. Fixed dishwasher that was not pumping out water. Keeping Mason's number for any future appliance needs!
Appliance Wizardz
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Reviewed in January 2025
Installation was fine. Orkie came back and fixed a problem (unrelated to the installation) with the water heater during an evening.
Hot Water Biz
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Reviewed in October 2023
the customer service was very helpful, very courteous, and informative. install was quick and easy
Mr. Handyman of Lees Summit, Raymore and Grandview
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Reviewed in September 2023
Used this company based on reviews for dishwasher water damage to ceiling in finished lower level. Impressed to get a quote before the estimater/owner left my driveway. Showed up on time, meticulously plastic and paper wrapped my area, patched a 15' hole/rectangle cut out by water...
J III Enterprises, Inc.
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Reviewed in June 2023
Branson came on time and diagnosed the issue with my dishwasher quickly. He wrote up separate quotes for both repair and replacement (to get reimbursed from the home warranty company)
N L Electric & Appliance Services
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Reviewed in December 2022
The installation was great. Cleaned up very well. Love my new patio door
Leone Remodeling
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Reviewed in March 2022
Very well - Joe arrived early, advised oversaw some of my DIY prep for dishwasher, added new shutoff values I requested, was very courteous and efficient. Good experience.
JOE LILLIS PLUMBING
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Reviewed in January 2022
The installers are very conscientious.
Ditgen Multi-Services
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Reviewed in January 2022
Gary was very professional and knowledgeable. He installed my hot water heater and removed the old one. He helped me select the new one and picked it up along with the parts needed for installation. I would use him for future projects.
Gary Gorski
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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.

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.

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.

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.

Not all dishwashers are 60cm wide, but that tends to be the most common size. 60cm translates into roughly 24 inches, with most home dishwashers being between 22 and 24 inches wide. There aren’t metrics available but it’s been our experience that over 90% of household dishwashers in North America are around 24 inches wide by 24 inches tall.

The Belton, MO homeowners’ guide to dishwasher installation services

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