If you're handy with tools and comfortable working under your sink, you can install a garbage disposal yourself. Here's a step-by-step guide to help you get the job done.
1. Turn off the power to your garbage disposal at the breaker box.
2. Remove the sink stopper and drain any water from the sink.
3. Disconnect the dishwasher drain hose, if applicable.
4. Loosen the mounting bolts on the garbage disposal with a wrench.
5. Remove the garbage disposal unit.
6. Install the new garbage disposal unit by reversing the above steps.
7. Turn on the power to the disposal at the breaker box.
8. Test the disposal by running water and flipping the switch.