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>

Do dishwashers need routine maintenance?

• <div><p>Dishwashers should be cleaned a minimum of once every 3 months, but really it should be done monthly. This is to prevent germ buildup and will help keep your machine running smoothly. Dishwasher maintenance isn’t too difficult, you’ll simply clean the filter, wipe down the spray arms with vinegar or rubbing alcohol, and run the cycle on empty. If there is any debris, you can remove it with a small metal pick. Do not use wood as the tip can break off inside the machine. </p></div>

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Verified Reviews for Dishwasher Installation pros in Hayward, CA

*The Angi rating for Dishwasher Installation companies in Hayward, 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 Hayward, 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 March 19, 2026

Reviewed in March 2026
Had a dishwasher repair that I needed. Person was on time and quick with work.
Limebricks Home Services
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Reviewed in January 2026
Rittinger responded quickly. Alan, the tradesman they sent over was professional and quick. I hired them to install a clothes dryer vent and to open up a vent in my garage for the hot water heater. The work was high quality and installation was clean.
Rittinger Heating and Air
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Reviewed in July 2025
Brought in to help with a misbehaving vacuum pressure breaker I installed. Turned out all I needed was a few minutes with a screwdriver! (I was expecting to have to re-do my DYI installation or get a different device). He was honest and saved me a ton of time and money!
Leon gardener services
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Reviewed in June 2024
The process was quick. From the design to the install. Installation was done in a few hours.
Ergeon
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Reviewed in May 2024
He repaired a dishwasher by clearing the hose, saved money. Later checked out a dryer and made honest assessment that would not be worth money to fix.
B & G Appliance Service
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Reviewed in June 2023
Robert and his crew did an excellent job. The install was done on time as promised. They left the yard cleaner than it was when they arrived and it is the most sturdiest fence we have ever had installed. I would highly recommend Apex Home Resources!
Apex Home Resources Inc
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Reviewed in May 2023
Needed a new subpanel installed ASAP. Rob had it installed and passed inspection the next day. Thanks!
Odom Electric, Inc.
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Reviewed in February 2023
Dishwasher door was not latching, came for inspection, did the service very quick and charged very fairly. Helped with another small issue with gas stove quickly while he was here. Overall, will call again.
Kantelec Repair LLC
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Reviewed in July 2022
He was very persistent in looking to solve my dishwasher problem. And he did!
Abe's Handyman Services
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Reviewed in January 2022
Work was completed very smoothly, sink was installed properly with garbage disposal and faucet
JustinWORKS
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Dishwasher Installation questions, answered by experts

Repair costs vary by issue, typically from $100 to $500, depending on the parts needed and labor involved.

Basic maintenance, such as cleaning filters, is DIY-friendly, but repairs involving electrical components, pumps, or valves should be handled by a professional.

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.

Local plumbing codes and manufacturer recommendations typically dictate the minimum distance between a sink and a dishwasher. This is generally 18 to 24 inches, providing enough room for easy loading and unloading of dishes without hindering the sink's function. Maintaining this separation not only adds convenience but also reduces the chances of water damage and optimizes plumbing connections.

Dishwashers should be cleaned a minimum of once every 3 months, but really it should be done monthly. This is to prevent germ buildup and will help keep your machine running smoothly. Dishwasher maintenance isn’t too difficult, you’ll simply clean the filter, wipe down the spray arms with vinegar or rubbing alcohol, and run the cycle on empty. If there is any debris, you can remove it with a small metal pick. Do not use wood as the tip can break off inside the machine.

The Hayward, CA homeowners’ guide to dishwasher installation services

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