Beatrice Lang
Garbage disposals are electrical appliances that help get rid of food waste and keep your kitchen clean. They come in various sizes and power settings, and replacing them can cost between $100 and $200 on average. Before attempting to replace your garbage disposal, it is important to ensure that it is not working properly and cannot be fixed. If it is, indeed, time for a replacement, you will need basic tools like a screwdriver, pliers, and protective gloves. You will also need to turn off the power supply at the circuit breaker to avoid electric shocks. The next steps involve removing the old garbage disposal and installing the new one, ensuring that all wires are correctly connected and the discharge tube is properly aligned.
How to Replace a Garbage Disposal with Electrical
| Characteristics | Values |
|---|---|
| When to replace | When the garbage disposal is not working properly, e.g., making a humming noise or a sound like metal grinding on metal. |
| Before replacing | Check if the garbage disposal is jammed or needs a simple fix, such as manually resetting the motor. |
| Tools required | Hex wrench, screwdriver, pliers, hacksaw, plumber's putty, silicone, and a new garbage disposal unit. |
| First steps | Turn off the power to the disposal unit at the main circuit breaker. Place a bucket under the pipes to prevent spills. |
| Removal process | Disconnect the drain trap from the discharge tube. Detach the disposal from the dishwasher connection and mounting ring. Remove the electrical cover plate and disconnect the electrical wires. |
| Installation process | Attach a power cord to the new disposal if it didn't come with one pre-installed. Connect the colored wires and the grounding wire. Reattach the cover plate. Align the mounting tabs with the mounting ring and lock it into place. Attach the gasket and discharge tube, then connect the tube to the sink drain. |
| Final checks | Plug in the new unit and turn on the breaker. Run water through the disposal to check for leaks. Test the new garbage disposal. |
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What You'll Learn
- Prepare your workspace: turn off the power and water supply
- Disconnect the discharge tube and drainpipes
- Remove the old unit: disconnect electrical wires, remove mounting ring and sink flange
- Install the new unit: align and secure the mounting ring, connect electrical wires
- Test the new unit: turn on the power, run water, check for leaks
Prepare your workspace: turn off the power and water supply
Before you begin to replace your garbage disposal, it is important to prepare your workspace and ensure your safety. Garbage disposals are electrical appliances with a live current running through them at all times when the power is on. Therefore, the first step is to switch off the power to the unit at the main circuit breaker. There may be a breaker dedicated to the garbage disposal, or you may have to shut off power to the entire kitchen.
Next, you should disconnect the discharge tube that connects your garbage disposal to the ground plumbing. Loosen any nuts or fasteners at the pipe's connection site and pull it free. You can then twist the mounting ring at the top of the disposal in a clockwise direction to disconnect it from your drain.
You should also consider turning off the water supply to your garbage disposal. This is not essential, but it can help to protect your belongings from water damage. Place a bucket under the pipes before detaching them to prevent spills.
Now that the power and water supply have been addressed, you can safely begin to remove the old garbage disposal and install the new one. Remember to keep your workspace dry and handle electrical wiring carefully to avoid shocks or injuries.
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Disconnect the discharge tube and drainpipes
Disconnecting the discharge tube and drainpipes is a crucial step in replacing a garbage disposal. Here's a detailed guide on how to do it:
Prepare the Workspace:
Before beginning any work, it is essential to ensure your safety and prepare the workspace. Wear protective gloves and make sure the workspace is dry to avoid any electrical shocks or injuries. Turn off the power to the disposal unit at the main circuit breaker. You may need to shut off power to the entire kitchen, depending on your setup. This step is crucial to prevent any risk of electric shock. Place a bucket under the P-trap to catch any spills or leaks.
Disconnect the Discharge Tube:
The discharge tube is the pipe that connects the garbage disposal unit to the ground plumbing. To disconnect it, first, locate the pipe extending from the side of the disposal unit. Loosen any nuts or fasteners at the connection site with a screwdriver. Once loosened, give the pipe a firm tug to pull it free. Ensure that you don't overtighten the screws when reconnecting the new discharge tube to avoid leaks or instability.
Disconnect the Drainpipes:
The drainpipes are connected to the garbage disposal unit and are responsible for carrying away the wastewater. To disconnect them, you may need to loosen other pipe connections to access the drainpipes. Use a hacksaw to adjust the length of the pipes if necessary. Place a bucket underneath to catch any spills, and then carefully disconnect the drainpipes.
Finalize the Discharge Tube Disconnection:
Before completely removing the discharge tube, check if there are any dishwasher connections that need to be detached. Make sure to disconnect the dishwasher line if you have one. Also, ensure that the discharge tube is not too long or too short for the new garbage disposal unit. If adjustments are needed, use a hacksaw to cut it to the appropriate length.
Additional Tips:
When working with electrical appliances like garbage disposals, it is crucial to keep safety a top priority. Ensure that the main power supply to the disposal unit is turned off before proceeding with any disconnections or connections. Additionally, always handle electrical wiring with care and avoid putting your hands or tools too close to the disposal when the main power is on.
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Remove the old unit: disconnect electrical wires, remove mounting ring and sink flange
To remove the old garbage disposal unit, you must first shut off the power at the circuit breaker. Look in your electrical panel for a labelled circuit breaker and shut it off. If your garbage disposal shares a circuit with the dishwasher, you may need to look for the circuit labelled for the dishwasher.
Once the power is off, you can begin to disconnect the electrical wires. Remove the electrical cover plate and detach the disposal from the electrical connections. If your disposal is hardwired, you will need to cut the white and black wires inside, near the wire nuts. If your disposal has a plug-in cord, simply unplug it from the receptacle under the sink.
Next, you will need to remove the mounting ring and sink flange. Detach the disposal from the mounting ring and remove the sink mounting hardware if necessary. Place a sturdy object directly underneath the disposal to support its weight. Remove the flange from above the sink drain and any old plumber's putty. If the flange sticks, use adjustable pliers to grip the lower end of the flange and rotate it one-quarter turn to unseat the plumber's putty.
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Install the new unit: align and secure the mounting ring, connect electrical wires
Before installing a new garbage disposal, it is important to shut off the main power supply at the circuit breaker and turn off the water supply. You should also place a bucket under the pipes to prevent spills.
To align and secure the mounting ring, you must first detach the disposal from the old mounting ring. Then, clean up the area around the sink opening, removing any old plumber's putty, sealing gaskets, and debris. Align the three mounting tabs with the new mounting ring. Use a wrench or screwdriver to turn the tabs and lock the mounting ring into place.
Next, align the rubber ring on the top part of the disposal with the drain flange. Secure the disposal loosely, then rotate it until the discharge outlet sits directly in front of the drain pipe connection. Tighten all the nuts and the rotating collar on the mounting assembly.
If your garbage disposal has a power cord, you can connect it to the electrical supply by matching the coloured wires on the disposal with those on the power cord and connecting them with wire nuts. Connect the grounding wire over the green screw and tighten it. Reattach the cover plate. If your disposal is hardwired, you will need to consult an electrician to run the wiring to the main service panel.
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Test the new unit: turn on the power, run water, check for leaks
After installing a new garbage disposal unit, you will want to test it to ensure it is working correctly. Before turning on the power, it is recommended to check for leaks. One way to do this is to pour a few cups of dyed water into the drain and use a flashlight to inspect the unit. If you don't see any leaks, you can turn on the power to the disposal from the breaker box and plug the disposal into the wall outlet.
To further test the unit, turn on the water faucet and let it run for a few minutes to check for any leaks under the sink. If you notice any leaks, make sure all the connections are tight. With the water running, turn on the disposal and ensure it is running smoothly. You can even test it with a few food scraps.
It is important to remember that leaks can occur for various reasons, such as loose connections, damaged pipes, a faulty seal, or a cracked disposal unit. Therefore, it is crucial to carefully inspect the unit and its connections before turning it on for the first time.
Additionally, when installing a new garbage disposal, it is recommended to check that the discharge tube is the correct length and sits flush over the opening. If it is too long, it can be cut with a hacksaw. The alignment of the new unit should also be checked to ensure it is tight and secure to prevent leaks or instability.
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Frequently asked questions
If your garbage disposal is making a humming noise or a sound like metal grinding on metal, it may be time to replace it. Before you do so, check for any objects jamming the disposal and reset the motor using a hex wrench or a standard Allen wrench.
You will need basic tools such as a hex wrench, screwdriver, pliers, hacksaw, plumber's putty, silicone, and a new garbage disposal unit.
First, turn off the power at the circuit breaker. Disconnect the drain trap from the discharge tube and the disposal from the dishwasher connection if necessary. Detach the disposal from the mounting ring and remove the electrical cover plate. Disconnect the electrical wires and remove the mounting hardware and the flange. Apply a new ring of plumber's putty and insert the new flange. Hang the new disposal by aligning the mounting tabs with the mounting ring and locking it into place. Attach the gasket and discharge tube to the disposal and tighten the screws. Connect the discharge tube to the sink drain. Plug in the new unit and turn the breaker on.
Replacing a garbage disposal typically takes less than an hour if you know what you're doing.
Before replacing your garbage disposal, take a picture of your existing setup and verify that your new disposal contains all the necessary pieces. Disconnect the power and water supply before beginning any work. Place a bucket under the pipes to prevent spills. If your new disposal did not come with a pre-installed power cord, you will need to attach one.
