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>

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 Sparta, MO

*The Angi rating for Dishwasher Installation companies in Sparta, 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 Sparta, 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 May 21, 2026

Reviewed in May 2026
I am very happy with the work that was done. I will be using them in the future. the job was done very quickly. the installer was very nice.
McPlumbing LLC - 4 Photos - Plumbing Service - 65622
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Reviewed in April 2026
Very good communication on when installing crew would arrive. Jessee arrived on time as promised, worked all day with 1 small break. Answered all our questions and explained what he was doing . Highly recommend this company. We had a walk in shower installed.
Mad City Windows & Baths
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Reviewed in June 2025
Everlast did a great job replacing a sliding patio door for me. Install looks great, they sealed the new door in well, and even cleaned up the broken glass from previous door. They charge a fair price for their work and communicate well.
Everlast Installations LLC
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Reviewed in June 2023
He was quick and timely and was able to complete installation to our satisfaction.
Owens Electrical
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Reviewed in July 2022
They were all polite helpful installation was much faster than we expected. Garage doors wouldn't work after installers have left called Scott they were back and had doors working with in 30 minutes. Very much appreciated.thank you
All Seasons Home Pros, LLC
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Reviewed in February 2022
We had a dryer vent relocated in our home. We had a slight misunderstanding about how to run it, but in the end the job was exactly what we wanted. The installers were polite and courteous the entire time and completed the job when they said they would.
Proman HVAC & Mechanical, LLC
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Reviewed in November 2021
Chris who made the initial estimate in our home was knowledgeable of water quality and was very pleasant. The installers were also kind and knew the requirements to install.
Aquasani, LLC
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Reviewed in September 2021
The installer completed our project during the hottest part of the summer and they’ve did a fabulous job.
Continental Siding Supply, Inc.
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Reviewed in May 2021
I originally called to get my dishwasher door adjusted from sticking. But then thought to ask, while scheduling, (it was not last minute requests), about my washer spinning off / out of kilter and the dryer hose needing to be replaced. He did all of that and was done in less than an hour....
Comfort Plus Heating and Cooling, LLC
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Reviewed in January 2021
Clean and professional installation. Easy to work with.
NextGen Electric, LLC
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Dishwasher Installation questions, answered by experts

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

Maintenance includes regular filter cleaning, checking water connections, and ensuring that the unit operates at optimal efficiency without blockages.

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.

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.

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.

The Sparta, MO 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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