2. Can my septic tank handle the load? Septic tanks are essential in the general installation and use of garbage disposals. If your home is hooked up to a septic tank, then the municipality that you live in may require you to upgrade your septic tank system if you decide to install a garbage disposal. A local building inspector will be able to tell you if you’ll need too. Also, you must take into account that you will be required to empty your septic tank more often.
Place the garbage disposal on a wide, clean work surface and locate the rubber gasket. The old gasket should be peeled off, and the new gasket should be mounted in the same spot. Take extra care to make sure that it sits flat and that it pops into the lip. Now you are ready to re-install your garbage disposal. Plug the cord back in reconnect each of the drains to make sure that there are no leaks.
Kitchen waste disposal units increase the load of organic carbon that reaches the water treatment plant, which in turn increases the consumption of oxygen. Metcalf and Eddy quantified this impact as 0.04 pound of biochemical oxygen demand per person per day where disposers are used. 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.
Flip the disposer over and unscrew the electrical cover plate on the bottom of the disposer by removing the cover plate screw. Again, be sure the power to the unit has been turned off at the electrical supply panel. Then disconnect the electrical cable connector. Pull out the wires and remove the wire nuts. Also unscrew the ground wire from the green ground screw. Be sure to save the electrical cable connector so you can use it again.
Another common cause for a leaking garbage disposal is the disposal flange. A leak at the very most upper area of the garbage disposal could be the garbage disposal flange which goes through the sink. A garbage disposal flange should be sealed with Plumber’s putty and then tightened from underneath the sink. If this is not tight enough or if it has managed to come loose (which can happen) then the garbage disposal will have to be taken down so the flange can be resealed and then the garbage disposal can be rehung.