The safe list: what your disposal can handle
A garbage disposal can break down soft food scraps — cooked vegetables, fruit peels, small bones from chicken or fish, coffee grounds, and eggshells. These materials are wet enough to move through the drain and soft enough for the blades to shred into particles small enough to pass through the drain trap. Meat scraps, including fat and gristle, also go down safely as long as the pieces are small.
The key is that everything should be food waste that would eventually rot in a landfill. If you can squash it between your fingers or cut it with a fork, it is almost certainly safe. Run cold water while the disposal is on, and keep it running for a few seconds after the grinding sound stops — this flushes the particles down the drain and prevents them from sitting in the trap.
Key Takeaways
- Soft food scraps like cooked vegetables, fruit peels, and small chicken bones are safe; hard items like fruit pits, shells, and bones from large animals will jam or damage the blades.
- Never put pasta, rice, potato peels, or fibrous vegetables like celery and corn husks down the disposal because they expand, tangle, or create paste that clogs the drain.
- Non-food items including grease, oils, coffee filters, paper, plastic, and metal will either clog the drain or damage the motor.
- Running cold water while grinding and for a few seconds after helps flush particles through the trap and prevents buildup.
- If something is stuck, turn off the disposal and use tongs or pliers to remove it — never put your hand down while the unit is plugged in.
Hard items that will jam or break the blades
Fruit pits, nut shells, bones from large animals (beef, pork, turkey), and seeds should never go down a disposal. These are too hard for the blades to break into small pieces. Instead, they either jam between the blade and the chamber wall, stopping the motor, or they crack the blade itself. Once a blade is cracked, the disposal will vibrate and make a grinding noise even when it is not clogged.
Shells from shellfish — clams, mussels, oysters — are also too hard. The same goes for avocado pits, peach pits, and cherry pits. If you have accidentally sent one down and the disposal is now stuck, turn off the power at the wall switch and do not try to force it. Use a flashlight to look down the drain, and if you can see the object, use tongs or needle-nose pliers to pull it out. Never put your hand into the disposal, even if the power is off, because the blades can still move if someone else turns it on.
Starchy and fibrous foods that create clogs
Pasta, rice, and potatoes should not go down a disposal because they absorb water and expand in the drain. A small amount of cooked pasta might pass through, but uncooked pasta and rice will swell as they sit in the trap, trapping other food particles and creating a blockage. Potato peels are especially problematic — they break down into a starchy paste that sticks to the drain walls.
Fibrous vegetables like celery, corn husks, onion skins, and asparagus wrap around the blade and tangle it. Banana peels, though soft, contain long fibers that do the same thing. Lettuce and leafy greens also tangle easily. If you have a lot of vegetable scraps, composting or throwing them in the trash is faster and safer than trying to grind them.
Grease, oil, and other liquids that solidify
Cooking grease, butter, and oil should never go down any drain, disposal or not. When hot, they flow easily, but as they cool in the pipes, they solidify and trap food particles, creating a clog that is hard to clear. Even a small amount of grease poured down regularly will build up over weeks and months. Let grease cool in the pan, wipe it out with a paper towel, and throw the towel in the trash.
The same rule applies to dairy products like sour cream, yogurt, and milk — they curdle and thicken in the drain. Peanut butter and other thick spreads also clog pipes. If you have accidentally poured grease down the drain, run very hot water for several minutes to try to flush it through before it sets, but prevention is much easier than clearing a grease clog.
Non-food items that damage or clog the disposal
Never put anything that is not food down a disposal. This includes coffee filters, paper towels, napkins, plastic bags, rubber bands, twist ties, labels, and glass or ceramic. These items do not break down and either jam the blades or get stuck in the trap. Metal objects like forks, spoons, and bottle caps will damage the blade or get wedged in the chamber.
Medications, vitamins, and supplements should also be kept out of the disposal — they do not belong in the water system. If you have old medications, check with your pharmacy or local waste disposal program for safe disposal options. The same goes for cleaning products, bleach, and other chemicals: they can damage the disposal motor and should never be poured down the drain.
What to do if something is stuck
If the disposal is making a grinding noise but not moving, or if it has stopped completely, something is likely jammed. Turn off the power at the wall switch when ready — do not try to restart it or force it. Unplug the unit if you can reach the outlet safely.
Use a flashlight to look down the drain and see what is stuck. If you can see it clearly and it is within reach, use tongs, needle-nose pliers, or a wooden spoon to pull it out. Do not put your hand down the drain. Once you have removed the object, turn the power back on and run cold water while turning the disposal on briefly to make sure it spins freely. If the disposal still will not turn or makes a grinding noise, the blade may be damaged and you will need to call a plumber.
Keeping your disposal clean and working longer
Run cold water before, during, and after each use. This keeps the motor cool and helps flush particles through the drain. Once a week, grind a handful of ice cubes to help clean the blades and chamber. You can also grind a small amount of lemon or orange peel to freshen the smell.
Do not use the disposal as a trash can for everything left on your plate. Scrape large amounts of food into the trash first, then use the disposal for small scraps. This reduces wear on the motor and keeps the drain from getting overloaded. If you notice the disposal is draining slowly or smelling bad, it may need cleaning — a plumber can do this, or you can try pouring baking soda followed by vinegar and hot water to break up buildup.
Frequently Asked Questions
Can I put cooked bones down the disposal?
Small, soft bones from chicken or fish are fine, but large bones from beef, pork, or turkey will jam the blades or crack them. If you are unsure, it is safer to throw the bone in the trash. Bones from larger animals are too hard for the disposal to handle.
What should I do if the disposal smells bad?
Run cold water and grind a handful of ice cubes, then grind a small amount of lemon or orange peel. If the smell persists, pour half a cup of baking soda down the drain, wait 30 minutes, then pour in a cup of white vinegar and hot water. Let it sit for 15 minutes, then run cold water and turn on the disposal briefly.
Is it okay to put a small amount of pasta or rice down?
A tiny amount of cooked pasta might pass through, but it is not worth the risk. Uncooked pasta and rice will expand in the drain and trap other food, creating a clog. It is faster and safer to throw them in the trash or compost.
Can I use hot water to help grind food faster?
No — always use cold water. Hot water can melt grease and oils, which then solidify in the pipes downstream and create clogs. Cold water keeps grease solid so it passes through without sticking to the drain walls.
What if I dropped something metal down the disposal?
Turn off the power when ready and do not try to restart it. Use a flashlight to locate the object, then use tongs or pliers to remove it. If you cannot see it or reach it safely, call a plumber. Metal objects can damage the blade and should be removed before the disposal is used again.