Keep fats, oils, bones, fibrous stems, coffee grounds in large amounts, and non-food items out of a garbage disposal. They can jam the blades or build up in pipes. When in doubt, scrape the food into the bin or compost and read your maker’s manual for the list it recommends.
Items to Keep Out
Fats, Oil and Grease
These flow as liquids while warm, then cool and coat the pipe walls. Wipe pans with paper towel and bin the towel instead.
Fibrous and Stringy Foods
Celery, corn husks, artichoke leaves and onion skins can wrap around parts and tangle.
Hard Items
Bones, fruit pits and shells are tougher than the blades are made to handle. Large amounts can jam the unit.
Swelling Foods
Rice, pasta and bread expand with water and can form a paste that clogs the trap.
Non-Food Objects
Bottle caps, labels, cutlery, plastic and paper do not belong in the sink opening.
Quick Reference Table
| Item | Problem | Better route |
|---|---|---|
| Cooking oil | Coats pipes | Wipe up, bin it |
| Bones | Can jam blades | Bin or compost |
| Celery stalks | Strings tangle | Compost |
| Cooked rice | Swells into paste | Bin |
| Eggshells | Debated; may gather in pipes | Compost |
Better Disposal Habits
- Scrape plates into a bin or compost caddy first.
- Feed only small soft scraps and run cold water throughout.
- Let the water run for a short time after the grinding stops.
- Use a sink strainer to catch bits you do not want in the drain.
What to Do After a Mistake
If something hard falls in, turn the unit off at the switch and, if your manual says so, at the breaker. Never reach inside by hand. Use tongs and a flashlight, then check the manual for the reset button and clearing steps.
- Do not use chemical drain cleaners without checking the manual.
- Do not force the unit to run when it is jammed.
- Call a licensed plumber if water backs up or the unit leaks.
Why These Rules Exist
A disposal does not chop food like a blender. Its parts break soft scraps into small pieces that wash away with water. That is why hard, stringy, greasy or swelling items cause trouble. The pipes beyond the unit are narrow, and a small blockage can grow slowly until the sink drains badly. Keeping the list in mind, or taping a short version inside the cabinet door, helps everyone in the household follow the same routine.
FAQ
Are coffee grounds fine?
Small amounts may pass, but they can pile up in pipes. Bin or compost them instead.
Can I put citrus rinds in?
Small pieces are commonly used to freshen a unit, although tough or large rinds should go in the bin. Your manual has the final word.
The Short Version
Keep out grease, bones, stringy produce, swelling foods and non-food objects. Scrape into the bin or compost, run cold water, and use a licensed plumber for repairs.