Material
Most disposals are made from aluminum or stainless steel. Aluminum is the less expensive and more common option, as aluminum garbage disposals cost $75 to $300, depending on power and size. However, aluminum disposals are prone to leaks and corrosion and have a shortened life span of under 10 years.
Stainless steel garbage disposals cost $400 to $1,100 but offer increased durability and minimal risk of corrosion or leaking. Stainless steel disposals are often found in high-volume households and commercial institutions.
Warranties
Your new disposal comes with a manufacturer’s warranty and potentially a second one from your installer. Check the fine print when purchasing or hiring a plumber to know what’s covered.
Warranties range from a year to 10, depending on the make and model. These are limited warranties that protect you from manufacturers’ defects, so you’ll still need to be careful about what you’re putting in your disposal to avoid costly mistakes.
Electrical Upgrades
The electrical needs of your disposal depend on the make and model and your local building codes. Some disposals are easily plugged into an existing 120-volt outlet and draw five to 10 amps, while some codes may require a dedicated 15-amp circuit with GFCI and AFCI protection.
GFCI (ground fault circuit interrupter) and AFCI (arc fault circuit interrupter) protection means your breaker will safely turn off if needed for increased safety. Call a licensed electrician if you need help figuring out the electrical requirements for your new disposal or need new wiring.