There is a contradiction among some of the brands. InSinkErator’s disposal instruction manual states, “Don’t grind large amounts of egg shells or fibrous materials like corn husks, artichokes, etc, to avoid possible drain blockage.” Whirlpool’s disposal instruction manual states, “designed to dispose of food wastes including bones, fruit and vegetable wastes, pits, egg shells and coffee grounds.”
When rubber gaskets age, they can develop leaks. The gasket can dry up, crack, and leak when it is repeatedly exposed to long periods of disuse where no water is present in the drain pipe. Should an older garbage disposal be removed and then placed back, it will require a new rubber gasket to again achieve a watertight seal. Moreover, if a gasket is not evenly locked on all three sides, then it will develop a leak.

Kitchen waste disposal units increase the load of organic carbon that reaches the water treatment plant, which in turn increases the consumption of oxygen.[28] Metcalf and Eddy quantified this impact as 0.04 pound of biochemical oxygen demand per person per day where disposers are used.[29] An Australian study that compared in-sink food processing to composting alternatives via a life cycle assessment found that while the in-sink disposer performed well with respect to climate change, acidification, and energy usage, it did contribute to eutrophication and toxicity potentials.[30]

If your garbage disposal is making a clicking or rattling sound, there may be some food particles that will not grind up inside. Remove power from disposer, reach into the sink hole with a pair of tongs and remove anything that is still down in the disposer. Test your disposer to be sure the noise is gone. If not continue troubleshooting your disposer issue (see below).

Garbage Disposal Replacement