MAPICan You Put Eggshells in a Garbage Disposal?
Eggshell advice is often repeated as a universal rule, but manufacturer capability matters more than folklore. InSinkErator's current food list explicitly includes eggshells across all three of its major residential series.
Yes, for current InSinkErator Badger, Power, and Advanced series, eggshells are listed among recommended food scraps. Use cold water, run the disposal first, and feed waste gradually. Other brands or models may have different guidance.
yes
The answer
Yes—if your disposal manufacturer lists eggshells as acceptable. InSinkErator currently includes eggshells among recommended scraps for its Badger, Power, and Advanced series.
Why
InSinkErator combines that food approval with operating instructions: start a steady stream of cool water, turn the disposal on, feed food waste gradually, wait for grinding to finish, and let water run briefly afterward. That means the answer is yes for those listed models, not a universal rule for every disposal brand.
When it is usually OK
- Your exact disposal series lists eggshells as acceptable.
- The disposal is operated with cool water.
- Eggshells are fed gradually with other normal food waste rather than packed into the chamber.
When you should not
- Your manufacturer says not to grind eggshells.
- You are relying on InSinkErator guidance for a different brand.
- The disposal is clogged, jammed, or not draining normally.
Risks and exceptions
- Large pre-loaded quantities can slow grinding.
- Using another brand's capability chart may exceed your disposal's design.
- Eggshell approval does not make fats, oils, or grease acceptable.
Best practice
Check your model's current food-grinding list. For InSinkErator models covered by its current guide, use cold water and feed eggshells gradually during normal operation.
Alternatives
- Compost eggshells if your local system accepts them.
- Place them in food-waste collection where available.
- Discard them with regular waste if your disposal manufacturer does not approve them.
Frequently asked questions
Does InSinkErator allow eggshells?
Yes. Its current guide lists eggshells for Badger, Power, and Advanced series.
Should I run water with eggshells?
Yes. InSinkErator recommends cool water before and during grinding and for a few seconds afterward.
Can I dump a bowl of eggshells into the disposal at once?
No. InSinkErator recommends feeding food waste gradually rather than pre-loading large amounts.
Are eggshells safe for every garbage disposal brand?
Not necessarily. Check the current instructions for your exact brand and model.
Sources
- What Can I Grind In a Garbage Disposer? — InSinkEratorOfficial
- How To Use a Garbage Disposal — InSinkEratorOfficial
Written by Mapiance Editorial Team
The Mapiance Editorial Team researches, writes, reviews, and maintains practical guides and explainers for MAPIANCE.
Reviewed by Mapiance Editorial Team
Published Sep 10, 2026 · Updated Sep 27, 2026 · Verified Sep 5, 2026