How to Install a Garbage Disposal
Time Required: Under 2 hours
Check with local codes before attempting to install a garbage disposer. Some communities have codes that don’t allow disposers because of limits on sewer capacity. They may also require an air gap for a disposer and a dishwasher.
- Remove the cover plate beneath the disposer.
- Connect the appliance cord if the disposer doesn’t come with one.
- Most cords and disposers have the same colored wires. Connect white to white, black to black, and the green wire to the disposer’s ground screw.
- Read the manufacturer’s instructions for wiring if the colors are different.
- Press a rope of plumber’s putty onto the underside of the drain flange.
- Insert the flange into the drain hole and press down evenly.
- Install the backup ring, fiber gasket and mounting ring from beneath the sink.
Place the disposer into the mounting ring.
- Make sure the outlet of the disposer is facing the drain pipe connection.
- Turn the lower ring clockwise until the disposer is supported by the mounting assembly.
- Use a hacksaw or tubing cutters to measure the discharge pipe and cut it to length.
- Install the discharge pipe to the outlet of the disposer.
- Attach to the drain line with slip nuts.
- Insert a screwdriver or disposer wrench into the mounting lug on the lower mounting ring.
- Turn clockwise until the disposer is locked into place.
- Tighten all slip nuts snug using water-pump pliers.
- Run water into the sink.
- Turn on the disposer and check for leaks.
- Tighten fittings if necessary.
Consider the following when shopping for new appliances:Consider the following when shopping for new appliances:
- 3-prong plugs are used for homes build before the year 2000.
- 4-prong plugs are used for homes built after the year 2000.
When you add professional installation to your new appliance purchase from The Home Depot, a compatible cord is required. The delivery agent carries both types of cords to make sure your home is covered.
When you purchase a new appliance from The Home Depot without professional installation, a 4-prong cord is sent by default. If your home is equipped with a 3-prong outlet, you will need to purchase a 3-prong cord or connector adapter separately.