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Garbage disposals can last between 10 and 12 years, so if your unit is pushing its lifespan, it may be a good idea to replace it. If your unit isn’t approaching the 10-year mark, try investigating other parts of the disposal to see if there's an affordable repair on the horizon. For example, rubber has a shorter lifespan than 10 years, connections and hoses loosen over time, and sink flanges can cause leaks that have nothing to do with disposals.

These appliances do unscrew, but you need to disconnect everything properly when you replace your garbage disposal. Make sure you shut the power off to the area first and check that it’s off with a voltage detector. Disconnect the main drain line and P-trap, and then disconnect the dishwasher drain line if you have one connected. You can then unscrew your garbage disposal using a disposal wrench. Just make sure you disconnect the electrical lines before removing your appliance.

The most common garbage disposal size in the U.S. is 1/2 horsepower. This size is ideal for households with three or fewer people or those that don't produce much food waste. Although 1/2 horsepower can't handle the typical food waste load for a household of four (which is about 250 pounds of food waste annually) as effectively as 3/4 horsepower, it remains the most common size of garbage disposal on the market.

Generally speaking, it’s absolutely worth it to repair a garbage disposal, so long as it’s eight years old or younger. Once you pass that eight-year threshold, it depends on the issue. If it’s a simple jam and the core components remain unaffected, call a local plumber for a quick repair. If it seems like the motor is wearing down, spring for a replacement unit.