The first step is to look under the sink to make sure a disposal system will fit. Then, at the breaker, turn the power off.
Remove the existing drain lines. Place a rag in the main drain to prevent leakage.
Next, loosen the large nut on the base of the sink flange, then let it drop down.
Push the strainer body through the sink and remove.
Carefully use the screwdriver to remove all the putty from around the sink opening. Use a rag to make sure none of the old putty is left and that the sink opening is clean.
Turn the mounting assembly over, then using a screwdriver and your fingers to loosen all the mounting screws until you have access to the snap ring.
Hold the fiber gasket and backup ring in place while slipping the mounting ring over the sink flange so it seats against the backup ring.
Place a wide rubber band around the flange to hold the parts in place. Be sure that it's above the snap ring groove.
Install the snap ring by sliding it up the sink flange until it pops into the groove.
Note: Be sure to remove the rubber band.
Tighten the mounting screws until the whole assembly is tight and even against the sink.
Note: Be sure to clean up any additional putty that has oozed out from the sink flange.
Place the electrical wire into the wire clamp that was installed earlier.
Once in the access hole, connect the black wire to black and the white wire to the other white wire.
Secure the wires together using wire nuts. You can also use electrical tape to attach the wire nuts to the wires.
Hook-up the ground wire.
To install the drain lines, attach the P-trap to the tailpiece and trap arm.
Insert the discharge tube into the T fitting. Do not fully tighten the slip nut.
Insert the other end of the discharge tube into the disposal system (Image 1).
Next, use a screwdriver to secure the metal flange using the bolt supplied with your disposal system.
Tighten all of the slip nuts (Image 2).