Step 6 · Restore Power and Test

Now it's time to test your work. Ensure all tools have been removed from the sink area and from under the sink. Plug the disposal back into the wall outlet or flip the circuit breaker back on. Go to the sink and turn on a strong flow of cold water. With the water running, flip the garbage disposal switch. The unit should now spin up to speed without humming. Let it run for 15-30 seconds with the cold water to ensure everything is flushed out.