Phases of Garbage Disposal Installation

Proper garbage disposal installation and service should follow specific phases to ensure fewer breakdowns in the future.

Proper Unit Wiring

Depending on the manufacturer and type of garbage disposal unit you may have, some will come with wiring attached and others may not.  If the wires for your unit are not attached, you would have to remove the unit cover plate and connect the wires using the instructions in the owner’s manual from the manufacturers.

Generally, wires will be color coded, which means that you simply need to match the colors.  Do not assume this though and still rely on what the manual says.  After completely attaching all the wires, make sure that the cover plate is securely screwed back on to protect the internal components.

The Drain Flange

Once the wires are in order, the drain flange and matching mounting ring should be installed.  Plumber’s putty should be applied to the underside of the drain flange under the sink.  Make sure that the plumber’s putty is approximately half and inch thick and about 10 inches in length.

The flange should be inserted into the drain hole and pressed down evenly to make sure that it attaches properly.  The backup ring should then be snapped on together with the mounting ring and fiber gasket.

Work on alternate sides with a screwdriver to ensure that the mounting ring fits tightly against the sink.  When it is tightened evenly, you will observe some of the plumber’s putty will be squeezed out from the flange.  Trim it away with a knife.

Mounting and Connecting

The disposal can be mounted into the mounting ring at this point.  It is important to make sure that the disposal outlet faces the drain pipe connection before you tighten the disposal into place.

The disposal should then be connected to the P-trap by measuring the discharge pipe and cutting it to size.  Use the hacksaw to create a clean cut that will easily attach to the garbage disposal outlet.  Follow the instructions in the owner’s manual to make a proper connection.

The dishwater discharge tube should also be connected at this point.

Testing the Disposal

Once everything has been mounted and connected, the next phase is to test everything to make sure there are no leaks or any other problems.

Turn on the power to the garbage disposal unit.  Let water run into the sink and operate the garbage disposal unit.  Allow the unit to fill up with water a bit before operating it.

While the garbage disposal unit is running, check underneath to verify there are no leaks.  Feed the unit some food waste to ensure that everything is disposed of correctly.

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