Tips on Replacing a Disposer

Choose the Right Replacement

• When replacing an old garbage disposer, consider your options carefully. A continuous feed disposal continues to run until you turn it off, while a batch feed disposal requires you to separate your debris into several batches and load them one at a time so it runs in spurts. Continuous feed disposals are generally the most convenient, but consider other factors, such as the disposal's noise and power levels. Some disposals also feature two-stage grinding, which pulverizes food and debris more finely so fewer clogs occur. In addition, if you have a septic system, you need a unit designed specifically for the system. A thin, stainless sink may not be able to support a large, powerful disposal, so consider your situation before choosing a new disposal.

Read the Instructions Carefully

• While many garbage disposal units feature similar structures, each model has different installation requirements and procedures. Before replacing an old disposal, read the manufacturer's instructions for the new unit carefully. Verify which installation items come with the unit and which items you will need to purchase separately. Check that you have all the necessary supplies and tools on hand before you begin to replace the disposal.

Turn Off the Power

• The first step in replacing your disposal is to remove the old unit. Before you begin this process, make sure that the disposal's power is turned off. For units that plug directly into an outlet, check that the plug is pulled out. If your old disposer is wired directly to its connection, shut off the breaker. The electrical cover plate must also be removed so you can disconnect the wires.

Orient the New Disposal Properly

• When you fit the new disposal into place, be sure that it is oriented exactly as the old unit was. Check that the outlet is turned toward and in line with the sink's drain. The drain fittings may not slip into place properly if the disposal is turned to one side or the other. Read over the new disposal's instructions to see if there are any other requirements for the unit's placement.

Use Right Length Discharge Tube

• The new disposal's discharge tube and drain inlet must be the right length for proper installation. If the new unit is the same size as the old disposal and its outlet has the same elevation, the discharge tube and drain inlet should be the same length that they were for the old. Adjust for any differences, using a hack saw to cut the pipes if necessary. If your discharge tube and drain inlet are too short, a longer piece of pipe or an extension piece is needed for the new disposal's installation.