How Difficult Is Garbage Disposal Installation?


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It is likely that you will need to replace your trash disposal at some time if you have one in your kitchen, as they typically survive for 12 years. Alternatively, while renovating an outdated kitchen, you could wish to install this for the first time.

how difficult is garbage disposal installation

If this is your first time installing one, be advised that certain plumbing and electrical skills are required; if you are not entirely sure of your abilities, you might want to hire a specialist to do the task. Though it is likely already installed in your kitchen, installing this circuit will be necessary before installing the disposal.

Take Out the Old Disposal

It is necessary to unplug the power from the previous disposal before taking it out. For a certain type of garbage disposal installation, the disposal may be “hardwired” directly into the circuit wiring; in this case, you will need to first turn off the electricity at the main service panel. Otherwise, this may be as easy as removing it from the electrical outlet.

Disconnect the drain connections that are connected to the trash disposal and then separate the garbage disposal from the disposal flange assembly to remove it.

Disposal flange assembly should be taken out of the sink drain. It is normally better to replace these pieces to guarantee a proper drain seal, however occasionally it is permissible to utilize the same gasket assembly even though you are substituting the previous model with a fresh one by the same manufacturer.

take out the old disposal

Fit and Mount the Drain Fitting Ring.

You must first install the component that will secure the trash disposal beneath the sink before you can install the disposal itself. A mounting ring and sink flange are sandwiched around the highest point as well as the bottom of the drain aperture in this unique type of drain fitting.

Plumber’s putty, applied one-half inch thick from within the sink, should be used to seal the sink aperture. Press the replacement disposal sink flange firmly through the plumber’s putty after inserting it into the sink aperture.

While you operate from underneath the sink, have someone keep the sink flanges in place from above. Click here to read more on sink flanges. Slide the triangle attachment ring and fibrous gasket onto the sink flange’s tailpiece. Insert the snap ring or round clip spring into the flange tailpiece’s groove to secure the ring.

Adjust the Mounting Ring Assembly’s Tension.

Using each of the three installation screws, slowly apply even pressure to the mounting assembly by tightening each one a little bit at a time. Once the surplus plumber’s putty has flowed out surrounding the drain opening and the sink flange ( is firmly against the sink’s bottom, tighten the screws.

Be careful not to overtighten as this might cause all of the plumber’s putty to be squeezed out, which is necessary to finish the seal. Using a rag, remove any leftover plumber’s putty from the area surrounding the sink’s drain opening.

Connect the Power Cord to the Disposal.

Prior to attaching the garbage disposal, you must locate the power cable that plugs in. Take off the power cover plate that is located on the disposal unit’s bottom. The strain relief fitting should be installed in the hole where the power wire will pass through, and the fitting nut should be tightened using pliers.

Using a screwdriver, tighten the stress relief clasp onto the power cord after feeding the loose end of the cord through it. Attach the disposal’s white lead to the electrical wire’s white (neutral) wire, its black lead to the black (hot) cable wire, and its green grounding led to the green ground wire of the cord using wire nuts. Replace the cover plate after tucking the linked wires into the electrical box of the disposal.

Get Ready for an Appliance Connection

In some setups, the dishwasher’s outflow and garbage disposal is run underwater. If it applies to you, find the dishwasher intake nipple located close to the disposal chamber’s top. The nipple plug may be removed by inserting a screwdriver inside and tapping it with a hammer (similar to a chisel).

The stopper, which is a plastic disk, will drop into the grinding chamber of the disposal. Extract the disk by reaching inside through the disposal unit’s lid.

Install the Trash Disposal

When doing this step, be careful not to strain yourself because the disposal might grow a little heavy.

Place the disposal’s top collar in line with the three attachment ears on the vessel sink mounting assembly to align it. Click here to read more on installation collars and fittings. As you keep the disposal in order to get the three fastening ears to engage with the installation collar around the bottom part of the drain fitting, turn the top collar in place.

Do not tighten the collar all the way; just enough rotation will hold the disposal container in place. Before you completely secure the device, you might need to make some tweaks to its location.

Attach the Drain Lines

Using the gasket and screws provided, attach the silicone discharge tubing to the disposal unit. Turn the disposal to place the discharge tube in line with the waste trap in the sink drain. To create the correct connections, you might need to shorten the pipes or add extension parts.

Connect the dishwashing line if necessary, once the drain line is connected. Place the dishwashing hose on the disposal nipple, then fasten it with the manufacturer’s supplied clamp.

Secure the Garbage Disposal Unit

Use a special tool that may have included the trash disposal or a Phillips screwdriver for leverage to tighten the spinning cam neck on the disposal to firmly secure it to the sink installation assembly. The disposal will probably click into place with a noticeable click.

Verify Leaks and Correct Functioning

Start the water and pass it through the garbage disposal to make sure there are no leaks in any of the connections. Tighten any slack drain connections if leaks are suspected. Ensure that the circuit electricity is turned on before plugging the disposal into the wall socket ( you designated for the installation.

Check how well the device is working, put some food scraps down the drain, and run the water and disposal.

Slice a lemon and throw it down at your garbage disposal once every few days or weeks so that it may ground up the lemon. By doing this, any smells from the disposal should be prevented.


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