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Reinstall and Test — Install the New Garbage Disposal

Beginner3 hours

Part of project

Replace Your Garbage Disposal: A Step-by-Step Guide · Step 5 of 6

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In this video

With all connections made, reinstall the dishwasher by carefully sliding it back into place under the counter and securing it with the screws. Reconnect the power to the dishwasher and garbage disposal. Turn the water supply back on. Place dry paper towels under all the new connections to easily spot any leaks. Run the dishwasher through a rinse or drain cycle to test the new drainage system. Check for any drips or leaks at the air gap, hose connections, and the P-trap assembly. If everything is dry, the installation is complete.

Goal: Ensure the system is leak-free and functioning correctly

  • Thoroughly check for leaks after running the dishwasher for the first time. A small drip can cause significant water damage over time.

Used in this video

  • ScrewdriverTo secure the dishwasher back in place under the countertop.
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FAQs

What is the most critical safety step I must take before starting to replace my garbage disposal?

Always disconnect power to the disposal at your home's circuit breaker before touching any wires or plumbing. This prevents electrical shock and injury. Verify the power is off by trying to turn on the disposal switch or a nearby kitchen light before you begin work.

Are the specified tools like Channellock pliers and an adjustable wrench truly necessary, or can I get by with standard household tools?

The specified tools are highly recommended for ease and effectiveness. Channellock pliers provide a strong grip for stubborn P-trap nuts, and an adjustable wrench is crucial for securing the mounting ring firmly. While you might manage with other tools, these will make the job much smoother, especially for a beginner.

What is the most common mistake beginners make, and how can I avoid leaks after installation?

The most common mistake is not properly sealing the sink flange or tightening connections sufficiently. Ensure you use a generous roll of plumber's putty around the sink flange before installation. After the unit is installed and connected, fill the sink with water and check thoroughly for any drips or leaks around all connections before restoring full power.

Is the estimated 3-hour time frame realistic for someone who has never replaced a garbage disposal before?

Three hours is a reasonable estimate for a beginner, assuming you have all tools and materials ready and experience no unexpected issues. Your first time might take longer as you familiarize yourself with the process. Allocating an extra hour or two allows for troubleshooting without feeling rushed.

Transcript
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getting our air gap installed and then obviously you're going to want to pressure test this or leak test it so I recommend putting down some like dry paper towels wherever you have these connections and seeing if you see any drips and then just run the dishwasher empty or full whatever and if things are good then great and good job wrapping this up

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