Rotate the disposer to align the disposer with the drain or the discharge tube, slide the flange over drain pipe or discharge tube and insert the gasket into the discharge outlet. Then screw in the bolts that secure the flange to the disposer. Reconnect all the plumbing connections as well as the dishwasher inlet hose. Then turn the power back on at the electrical supply panel and test the unit for leaks, making sure to run cold water while the unit is running.
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.
If you’re like most people who cook, your kitchen probably looks like a disaster zone after preparing a meal for your family and eating it. The cleanup process is going to go much more quickly if you can stuff leftover food waste down the drain. Most garbage disposals have a switch located near the kitchen sink. All that you have to do is turn the faucet’s cold water on, flip the switch, and put the remaining leftovers in the drain.
Some folks knocked the instructions. Take heart. It appears that the Waste King guys have heard the criticisms from the negative reviewers. I am guessing that they have been re-written to better explain the installation because they are really easy to follow. My best advice is this: don't be afraid of a difficult or confounding set of installation instructions. It is really easy. Here's what you do. Go to youtube.com and search for a video on How To Remove Your Existing Garbage Disposal because this is the hardest part. You will find one that matches yours. Watch it. I started removing the Badger incorrectly, stopped, watched a video, and then it was a piece of cake. In my case, I shouldn't have removed the three long screws before removing the body of the old one. You do it after it is disconnected. READ the instruction manual carefully. Then go ahead and youtube the Waste King installation video. It is very easy once you see it done. No filing or grinding gaskets, and Good Lord, no car jacks under your sink please. If it is hard then you are doing something wrong. STOP!!! Review the procedure. Start again. The directions are actually very explicit. The parts are well labeled. The diagrams show you what to do. The videos show you what to do. If you prepare yourself (15 minutes of reading and watching videos, tops) you will fly though the installation and be a happy person.