While it certainly isn’t always necessary to replace your disposal just because you’re getting a new sink or updating your kitchen appliances, it may be a good time to do so, especially if your unit is over ten years old. Since you already have professionals on the site, it may be more cost efficient and convenient to go ahead and replace an older unit instead of waiting for it to fail at a future date.
The horror movie image of victims having hands and arms severed in a garbage disposal is entirely a Hollywood invention. In reality, the blades inside a garbage disposal are rather dull grinders, not gleaming, razor-sharp sabers. That is not to say that a disposal should be taken lightly—it is indeed possible to be painfully injured if you don't practice basic safety measures. 
Inspect each of these locations while gliding a light-colored rag over the unit; the dyed water will readily show on the rag and reveal the location of the leak. If a leak isn’t immediately apparent, remove the sink stopper and pour a few more cups of dyed water down the sink drain, then check for leaks again. Leaks near the top of the unit are more likely to show themselves while the sink is plugged, while side and bottom leaks are more noticeable while the sink is unplugged.
Turn off the garbage disposal at the breaker box. Remove the drain pipe if it is leaking there. Most attachment clamps are wire clamps with two protruding wires that are pushed together to release the drain pipe. Push the wires together and remove the clamp. Pull the pipe off and inspect the seal for any debris that may have lodged between the seal and the pipe. Wipe the seal with a damp rag to remove any dirt, debris or food particles. Sometimes the wire clamp loses tension. In that case, tighten the hose clamp down in its place, which may secure the pipe leak-free.

Run a few trays of ice cubes, orange peels and salt through the disposal to remove odors and keep your disposals clean. For really tough odors, add 1/2 cup of baking soda and 1/2 cup of vinegar and let it stand for 15 minutes before rinsing. Also, running ice through the disposal will actually sharpen the teeth, keeping foods from getting stuck in the unit.

This part of the installation starts by removing the old mounting ring by loosening the mounting screws and then removing the snap ring, which holds the mounting assembly on the sink flange. You’ll need to use a flathead screwdriver to remove the snap ring. Next, remove the mounting ring by inserting the screwdriver into the tabs and turning the mounting ring assembly until it is free from the tabs. Be sure to support the bottom of the disposer as you do this. After this comes off, the entire mounting assembly will come free from the sink flange. Once free, pull the sink flange out from the top of the sink and scrape or wipe any old putty off the sink before wiping it clean with a towel.

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.[27] 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.[citation needed]
The Camorra was never a coherent whole nor a centralised organization. Instead, it has always been a loose confederation of different, independent groups or families. Each group was bound around kinship ties and controlled economic activities which took place in its particular territory. Each family clan took care of its own business, protected its territory, and sometimes tried to expand at another group’s expense. Although not centralized, there was some minimal coordination, to avoid mutual interference. The families competed to maintain a system of checks and balances between equal powers.[26]

Garbage Disposal Replace