Make the electrical connections Remove the electrical cover plate on the new disposal.Then, from above, remove any excess silicone from around the flange seal. Tighten the screws on the mounting assembly, alternating screws as you tighten, until the ring is uniformly secure.
HOW TO REPLACE GARBAGE DISPOSAL FLANGE INSTALL
From above the sink, press the flange into the drain hole.From underneath the sink, install the gasket, the backup ring if one comes with your model, the mounting ring and the snap ring over the neck of the sink flange.
Disassemble the new disposal hardware – Most new disposals are shipped assembled, so you have to disengage the mounting assembly from the body of the disposal, then pry the snap ring off of the mounting ring with a screwdriver.Clear any remaining plumber’s putty, old sealing gaskets or other debris from the area before you install the new hardware. Pull the mounting ring away from the sink flange and remove any backup rings, gaskets or other parts of the mounting assembly.From above, pry the sink flange out of the drain hole. Remove the old mounting ring and sink flange – Use a screwdriver to pry off the snap ring on the old mounting assembly, and remove the screws that connect the mounting ring to the sink flange.If there’s no current, pull the wires apart and loosen the clamp that holds the electrical cable.
Then, to be doubly sure that the power is off, carefully remove the wire connectors that join the wires inside, and use a voltage tester to test individual wires. Disconnect the disposal’s electrical wiring – Once the disposal is disengaged, remove the screws securing its electrical cover plate, which is usually on the bottom of the unit.In that case, use a screwdriver.) Turn the assembly counterclockwise to release the disposal from its mounting. (The disposal probably came with a special tool for those screws, but chances are you won’t be able to find it. Hold the disposal from underneath with one hand while you loosen the screws on the side of the mounting assembly. (You may also find a clean out plug on the underside of the pipe.) Once the P-trap is drained, remove hose clamps, discharge tubes and any other fittings that connect the old disposal to the drain pipe. Remove the disposal – Use a pipe wrench, a large adjustable wrench or a large pair of tongue-and-groove pliers to undo the slip fittings on the P-trap, and release the trap’s contents into a bucket.You can’t be too careful when electrical connections are near water. If the outlet under the sink is corroded or otherwise in bad repair, we suggest hiring an electrician to replace it. When the circuit is shut off, the disposal will stop. To be sure the power is off, we prefer to run the disposal while a helper at the main service panel locates the right fuse or circuit. Most disposals have power cords that run from the underside of the disposal to a switch-controlled outlet under the sink. Disconnect the power – Turn off the power to the disposal by pulling the fuse or switching off the circuit breaker that controls the unit.
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