5 Things You Should Never Put Down Your Garbage Disposal

We've all done it. You're cleaning up after a great dinner, the garbage disposal is roaring, and it feels like a magical black hole that can make any food scraps disappear instantly.

But here at Back 2 Good Plumbing, we see the aftermath of that "magic" every single day.

While garbage disposals are incredibly tough, they aren't trash cans. They don't actually have sharp, spinning blades like a blender — instead, they use impellers to push food against a grinding ring. When you feed them the wrong items, they don't get pulverized. They turn into a thick, pipe-clogging paste or jam the machine entirely.

To save yourself the headache of a backed-up kitchen sink, here are 5 things you should never put down your garbage disposal.

It seems harmless enough. Grounds are tiny, so they should wash right down, right? Unfortunately, no. When coffee grounds hit water, they turn into a dense, tightly packed paste. If you dump your morning grounds down the sink day after day, they will accumulate in the trap under your sink like wet sand — eventually bringing your drainage to a complete halt.

Better choice: Throw them in the trash or use them as compost for your garden.

This is the number one cause of major kitchen clogs. When grease or oil is hot and liquid, it pours down the drain easily. But as soon as it hits your cold pipes underground, it cools, solidifies, and coats the inside of your plumbing. Over time, other food particles get trapped in that grease, creating a massive, stubborn blockage.

Better choice: Let grease cool in an old can or jar, then toss it in the garbage.

Think about what happens when you cook pasta or rice: it absorbs water and swells to double or triple its size. The exact same thing happens inside your drain. Even after the disposal chops it up, those starchy fragments will continue to absorb water in your pipes, creating a thick, gooey paste that blocks water flow.

Better choice: Scrape starchy foods into the trash before rinsing your dishes.

There is an old myth that eggshells sharpen your disposal's "blades." As we mentioned, disposals don't have blades — so this doesn't work. Worse, the stringy, sticky inner membrane of the eggshell can wrap itself around the moving parts of the disposal, while the tiny shell fragments can easily get glued to grease in your pipes.

Better choice: Compost them or toss them in the trash.

Celery, asparagus, corn husks, onion skins, and potato peels are a disposal's worst nightmare. The long, tough fibers in these vegetables act like literal strings — they can wrap around the disposal's impellers, jamming the motor and burning it out.

Better choice: These go straight in the trash or compost bin.

• Do you regularly put coffee grounds or eggshells down the disposal?
• Do you pour cooking grease or oil down the kitchen sink?
• Is your kitchen sink draining slower than it used to?
• Is your disposal humming but not spinning?

Two or more checked? Your disposal or drain line may already need attention.

If your disposal is currently humming but not spinning, making a strange rattling noise, or your sink is filling up with dirty water, it's already telling you it needs help.

Avoid using harsh, store-bought chemical drain cleaners — they can corrode your plumbing hardware and damage the plastic components inside the disposal.

Need a hand getting things back to normal? Give the team at Back 2 Good Plumbing a call or text at 936-300-2437. We serve Trinity County and Deep East Texas, and we'll get your kitchen sink back to good in no time.