A garbage disposal handles small amounts of suitable food residue; it is not a trash can. What the unit can process depends on its model and the connected plumbing, so the manufacturer’s instructions should always take priority.
Do use cold water and small portions
Run cold water before switching on the disposal. Feed acceptable scraps gradually instead of packing the chamber. Let the disposal finish grinding, then continue the water briefly to help move particles through the drain. Cold water helps fats remain more solid, although fats and grease should still be kept out of the drain.
Do keep the splash guard and sink clean
With the unit off, clean accessible sink surfaces and the removable splash guard as permitted by the manufacturer. Routine cleaning helps control odor-producing residue. Persistent odor can also indicate buildup in the drain or another plumbing issue.
Don’t put these materials into the disposal
- Cooking grease, oil, or fat
- Bones, shells, fruit pits, or other very hard items
- Fibrous husks, peels, and large amounts of celery or similar material
- Coffee grounds and large quantities of eggshell
- Rice, pasta, flour, or other expanding and starchy material in quantity
- Glass, metal, plastic, paper, cloth, chemicals, or non-food waste
Rules vary among disposal models, particularly for tougher food waste. When in doubt, use the trash or compost instead.
Don’t use your hand to remove an obstruction
Switch the disposal off and disconnect power according to the manufacturer before any permitted inspection. Never place fingers or hands in the grinding chamber. Use only the recommended tool and procedure. If the unit hums, trips repeatedly, leaks, or will not rotate, stop operating it and arrange service.
Why the disposal may drain slowly
A slow sink can result from food buildup in the trap or branch drain, grease farther down the pipe, a jammed unit, or another drainage problem. Repeatedly resetting the disposal will not clear a blocked pipe. Avoid mixing chemical drain cleaner with disposal work because trapped chemicals can cause injury.
When repair or replacement is appropriate
Professional evaluation is useful for leaks, damaged wiring, recurring jams, cracked housings, unusual grinding sounds, or a unit that no longer starts after safe basic checks. The cause may be a connection that can be repaired, or the unit may need replacement. Review MaxRooter’s garbage-disposal service information and drain-cleaning guidance.