But there is really only one rule you need to follow: Never put your hand or fingers down into the disposal, even if you think the disposal has been unplugged or its circuit has been shut off. If a disposal gets turned on accidentally while your fingers are in the opening, the likelihood is that you will end up with bruised fingers, not bloody amputation. But this is not a risk that is necessary in any way.
Some other kinds of garbage disposal units are powered by water pressure, rather than electricity. Instead of the turntable and grind ring described above, this alternative design has a water-powered unit with an oscillating piston with blades attached to chop the waste into fine pieces. Because of this cutting action, they can handle fibrous waste. Water-powered units take longer than electric ones for a given amount of waste and need fairly high water pressure to function properly.
If you're replacing a commercial garbage disposal, then you'll either want the Drain Strainer with Crown Adapter or the Drain Strainer XL. Both of these models have a universal Crown Adapter on top that serves as a funnel to cover the hole once the commercial garbage disposal has been removed. Note that it doesn't actually attach to the sink bowl, but you'll adjust the legs to get your unit flush underneath the bottom of the sink.
Personally I'd recommend if you have a disposal have it removed. Most people don't realize, there is very little you are supposed to put in them. Whereas, they are the primary reason for your kitchen sink drain getting clogged. Just use the trash, it could save you an expensive Drain cleaning bill. Here's a tip for y'all who do have them. After use let warm water run while it's still running for 3 to 4 minutes, that will help push everything to the bigger main drain .
Before your garbage disposal installation appointment, please have on hand the garbage disposal you purchased, including all screws and other pieces that came with it. If the job isn't a standard garbage disposal installation project, and requires additional parts or labor to complete the service, additional fees may apply to cover the cost of the garbage disposal parts and the garbage disposal installation work.
Whether you repaired or replaced the leaking garbage disposal, test for any missed problem spots. Wipe the unit dry with a clean cloth, then unplug the sink drain (if plugged) and pour a few cups of dyed water into the drain once more. Use a flashlight to inspect the entire unit. If you don’t observe a leak, turn on the power to the disposal from your breaker box and plug in the disposal at the wall outlet.