How to Install a Garbage Disposer

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Garbage disposers offer a more convenient way to clean up your kitchen and get rid of food scraps

How to Install a Garbage Disposer

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.

WHAT YOU NEED FOR THIS PROJECT

1
WIRE THE DISPOSER
Wire the disposer - Install Garbage Disposer

• 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.

2
APPLY PLUMBER’S PUTTY
Apply plumber’s putty - Install Garbage Disposer

• 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.

3
INSTALL MOUNTING RING
Install mounting ring - Install Garbage Disposer

• Tighten the mounting screws for the upper mounting ring.
• Alternate the tightening of the screws to pull the ring up evenly against the sink.

4
MOUNT THE DISPOSER
Mount the disposer - Install Garbage Disposer

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.

5
CONNECT OUTLET TO P-TRAP
Connect outlet to p-trap - Install Garbage Disposer

• 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.

6
TIGHTEN MOUNTING LUG
Tighten mounting lug - Install Garbage Disposer

• 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.