What are expert tips for what to grind & what to avoid?

Run cold water for 15 seconds before and after grinding. Cold keeps grease solid so it chops up rather than coating pipes. Feed scraps gradually -- don't stuff the disposal full then turn it on. Ice cubes once a month clean the grind chamber and sharpen the impellers. When in doubt, compost it or trash it.

What mistakes should I avoid with what to grind & what to avoid?

Pouring grease down with hot water, thinking it will wash through -- it solidifies further down. Grinding potato peels -- the starch creates a thick paste that clogs. Using hot water while grinding. Cold water is correct. Running the disposal without water.

What to Grind & What to Avoid | The Plumbing Directory

Overview

Your garbage disposal is not a trash can. It's designed to handle food scraps that rinse off plates -- not everything that fits down the drain. Grinding the wrong stuff is the number one cause of jams, clogs, and premature failure. Knowing what goes in and what doesn't saves you from the most common disposal problems.

What to Know

Safe to Grind

Most soft food scraps are fine: fruit scraps (no pits), vegetable trimmings, small bones (chicken wings, fish), cooked meat scraps, bread, cereal, rice in small amounts, eggshells, and ice cubes. The key word is scraps -- not entire meals.

Never Put These In

Grease, oil, and fat -- they solidify in the drain line. Fibrous vegetables like celery, artichokes, corn husks -- strings wrap around the impellers. Pasta and rice in large amounts -- they expand and create paste-like clogs. Coffee grounds accumulate in the trap. Thick bones from beef or pork ribs.

The Grease Problem

Grease is the single biggest drain killer. It goes down liquid and hot, then solidifies as it cools in the pipe. Over months, grease narrows the drain until it clogs completely. The disposal can't prevent this -- the clog happens downstream. Wipe greasy pans with a paper towel and throw it in the trash.

Non-Food Items

No glass, metal, plastic, rubber bands, twist ties, produce stickers, or sponges. Produce stickers are sneaky -- they peel off fruit and don't dissolve. They gum up the works.

Pro Tips

Run cold water for 15 seconds before and after grinding. Cold keeps grease solid so it chops up rather than coating pipes.
Feed scraps gradually -- don't stuff the disposal full then turn it on.
Ice cubes once a month clean the grind chamber and sharpen the impellers.
When in doubt, compost it or trash it.

Mistakes to Avoid

Pouring grease down with hot water, thinking it will wash through -- it solidifies further down.
Grinding potato peels -- the starch creates a thick paste that clogs.
Using hot water while grinding. Cold water is correct.
Running the disposal without water.

When to Call a Pro

If you have a grease clog downstream, a plumber can snake the line or hydro-jet it. Repeated clogs despite proper use usually mean the drain line has buildup that needs professional cleaning.

Bottom Line

Soft food scraps with cold running water -- that's what a disposal is for. Keep grease, fibrous veggies, and starchy foods out, and your disposal and drain will run trouble-free for years.

What to Grind & What to Avoid