7 Things You Should Never Put Down Your Garbage Disposal

Coffee Grounds

Coffee grounds look harmless because they're small and seem to rinse away easily. What they actually do is clump together in the drain line and form a dense, wet mass that water can't push through. The disposal handles them fine, but the pipe doesn't.

Compost your grounds or throw them in the trash. If you've been rinsing them down for a while, it's worth running a strong flush of water to clear out whatever has settled in the bends of your drain.

Daily coffee drinkers are the most likely to see this problem develop without realizing the grounds are the cause. The clog builds slowly, the drain gets sluggish, and by the time it's obvious something is wrong, there's a massive blockage sitting in the pipe.

Fibrous Vegetables Like Celery and Artichokes

Celery stalks, artichoke leaves, asparagus, and similar vegetables have long, stringy fibers that don't cut cleanly. The disposal's blades spin them into a tangled mess that wraps around the motor shaft and jams the unit. A jammed motor that runs hot long enough burns out.

Toss fibrous vegetable scraps in the trash or add them to a compost bin. The time you save isn't worth the repair call. Disposal blades are designed for soft food waste, not fibrous plant material with the tensile strength of twine.

Onion skins fall into this category, too. The thin papery layers slip past the blades and catch on the drain line instead of grinding down. They're easy to overlook but contribute to the same kind of buildup.

Pasta, Rice, and Other Starchy Foods

Pasta and rice expand when they absorb water. If you send them down the disposal, they keep expanding inside the drain. Starchy food waste also forms a sticky paste that adheres to pipe walls and grabs onto anything else passing through.

A small amount isn't a crisis, but regular disposal of pasta, rice, oatmeal, or bread creates buildup. These foods are better off in the trash. If your drain is already moving slowly, starchy waste will make it worse faster than almost anything else.

The starch issue gets worse in older plumbing with rough interior pipe surfaces. Paste accumulates faster in those conditions, and a slow drain can turn into a full blockage without much warning.

Eggshells

Eggshells generate a lot of debate. The shells themselves aren't the main problem, but the thin membrane lining the inside is. The membrane wraps around the disposal's moving parts and sticks. Combine that with the fine, gritty particles the shell produces, and you get a combination that coats the drain line and collects grease.

Eggshells belong in the trash or compost. They're not going to destroy a disposal in one go, but they're not doing it any favors either. Skip them as a matter of habit.

Bones and Fruit Pits

Chicken bones, pork chop bones, peach pits, and avocado pits shouldn’t go near a garbage disposal. Disposal blades spin fast enough to handle soft food waste. They're not built to grind through hard, dense material. Bones and pits either spin around without being cut or crack into sharp pieces that damage the blades.

A disposal unit that takes repeated impact from hard materials wears down faster and loses grinding efficiency. Garbage disposal replacement becomes necessary sooner than it should. Bones and pits go in the trash, no exceptions.

Small fruit seeds cause the same problem on a smaller scale. Cherry pits, peach stones, and apple seeds are hard enough to chip or dull the blades. The damage is gradual, but it adds up and degrades performance noticeably within a year or two of regular misuse.

Chemical Drain Cleaners

Liquid drain cleaners are sold as a quick fix, but they're corrosive. They eat through organic material, which sounds useful until you consider that your pipes, disposal seals, and rubber components are in the same path. Repeated use degrades those components and shortens the life of the unit.

Chemical cleaners also don't fully clear a clog. They eat a hole through the blockage and leave residue behind. The clog rebuilds. A qualified plumber in Mableton, GA, using a mechanical solution, removes the material rather than chemically thinning it.

If you have a slow drain, use a disposal-safe cleaner, try a plunger, or call for a service. Don't pour caustic chemicals into a unit you're trying to protect. The short-term fix costs more in the long run when seals fail, and the unit needs early replacement.

What to Do When Your Disposal Is Already Struggling

If your disposal hums but doesn't grind, it's likely jammed. Most units have a reset button on the bottom and a hex key slot for manually turning the grinding plate. Turn off the unit, use the hex key to free whatever's stuck, press reset, and try again. If the unit is leaking from the bottom, the internal seals have failed. Signs it's time for garbage disposal replacement include:

• Persistent odors that don't clear after cleaning
• Frequent resets or tripping the circuit
• Grinding noises that started recently and haven't stopped
• Water is backing up into the other side of a double sink

A disposal showing two or more of these signs at once is past the point of repair. Replacement is the more cost-effective call. Most units last between eight and fifteen years, depending on use and maintenance, so age is worth factoring into the decision.

Does Your Disposal Need a Repair or Replacement?

If your disposal is struggling, leaking, or dead, don't let it sit. A slow or failed unit backs up your drain line and creates problems further down the pipe. Call Mr. Rooter Plumbing to schedule a service. Our local plumbers diagnose the problem, give you a clear answer on repair versus replacement, and get it taken care of without the runaround.