When you need garbage disposal installation
- Replacing a failed or leaking unit
- Adding a disposal to a sink
- Upgrading horsepower
- Upgrading from a noisy older unit to a quieter, insulated model
How it works
- Remove the old unit or install a new flange
- Knock out the dishwasher inlet if connecting a dishwasher
- Mount, align the discharge with the trap
- Connect power
- Test for leaks and operation
Limits and when it’s not the right fix
- A switched outlet or hardwired circuit is required.
- Septic systems may be affected by disposal use.
What affects the cost
We don’t publish national price figures because real quotes vary too much by region, access and the condition of your system. These are the factors that move the price:
- Unit size
- Electrical work needed
- Drain realignment
Ask for a written quote that names the method, materials and any permit or restoration work before work begins.
Garbage Disposal Installation: common questions
Can I put a garbage disposal on a septic system?
Some manufacturers make septic-rated models, but disposals add solids to the tank and may require more frequent pumping. Check with your septic professional.
What horsepower disposal do I need?
Many households use 1/2 to 3/4 horsepower units. Larger households or heavy cooking may prefer 3/4 to 1 horsepower.
How long does a garbage disposal last?
Many last roughly 8 to 15 years depending on use, model and maintenance.
Can a garbage disposal be installed on any sink?
Most standard kitchen sinks with a 3.5-inch drain opening can take a disposal, provided there’s power available under the sink and enough cabinet space.
