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>

How long will it take to install my dishwasher?

• <div><p>Installing a dishwasher should take one to four hours, depending on the complexity of the installation and whether you DIY or hire a pro. Even if you're particularly handy, installing a dishwasher on your own will likely take longer — at least two hours. On the other hand, a professional can likely install a dishwasher in about an hour. Installation time will take longer if you have to remove an existing dishwasher, reroute plumbing, or repair damaged flooring underneath the appliance.</p></div>

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Verified Reviews for Dishwasher Installation pros in Oakland, MO

*The Angi rating for Dishwasher Installation companies in Oakland, 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 Oakland, 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 13, 2025

Reviewed in June 2025
I hired this pro because he was honest about how difficult it is to deal with cutting tile around faucets in these old houses. He recommended cutting a big portion so the tile could be repaired if it broke but I would need a tile person to come in and fill in the tile. When he heard it was my...
Parkers Plumbing, LLC
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Reviewed in May 2024
Paul was kind enough to point out that he had noticed our gutters were clogged and he fixed those too. He also leveled our dishwasher with no increase in the fee heâ d quoted for installing our microwave.
Pauls Honey Do Service
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Reviewed in January 2023
Ended up with a Replaced garbage disposal. Came to check a leaky dishwasher. Said dishwasher wasn’t leaking but it is. So they were wrong
All American Appliance Service Inc
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Reviewed in June 2022
Our installer was very easy to work with, and was eager to accomplish what we asked for. Great guy.
Quality Flooring
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Reviewed in February 2022
The whole process was easy and painless from ordering the door to having it installed. Highly recommend, will hire again.
Chaney Windows and Doors LLC
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Reviewed in July 2021
Experienced installer that worked quickly and efficiently.
CVM Enterprises, Inc.
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Reviewed in May 2021
Posted a homeadvisor request and Stag installed a wash machine quickly the next day. Would hire them again.
Stag's Design Air & Home Repair, LLC
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Reviewed in March 2021
When our new dishwasher was delivered, the plumber informed us that our electric wasn't up to code so he couldn't install. Desperate for an electrician, we called Streib and they had someone to us within the hour. Carson was professional and wore a mask the whole time. We will definitely use...
Streib Company
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Reviewed in November 2019
The installers were efficient, quick and clean. Would hire again
Holper's Insulation & Weatherization
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Reviewed in May 2019
Charged me over $500 to install a kitchen faucet. I can get a new dishwasher installed from a famous home appliance store for that.
Fixii Pro
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Top-Rated Dishwasher installation pros in Oakland - Updated Nov 2026

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Dishwasher Installation FAQs, 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.

Costs depend on labor rates, replacement part prices, brand, and whether emergency service is required.

Installing a dishwasher should take one to four hours, depending on the complexity of the installation and whether you DIY or hire a pro. Even if you're particularly handy, installing a dishwasher on your own will likely take longer — at least two hours. On the other hand, a professional can likely install a dishwasher in about an hour. Installation time will take longer if you have to remove an existing dishwasher, reroute plumbing, or repair damaged flooring underneath the appliance.

Most dishwashers are designed with a standardized width of around 24 inches and can fit into most kitchen spaces intended for dishwashers. However, the height and depth might vary slightly, requiring careful measurements to ensure a proper fit. Certain specialized or compact dishwasher models might deviate from the standard size to accommodate specific needs or non-standard spaces. While many dishwashers adhere to a typical size, measuring the available space accurately is crucial to guarantee a seamless installation.

To extend the lifespan, clean filters regularly, run cleaning cycles with vinegar, avoid overloading, and check for leaks.

The Oakland, MO 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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