Can You Put Coffee Grounds Down the Sink? What to Know for Your Plumbing
Lead: The quick answer
No—pouring coffee grounds down the kitchen sink is not recommended. Although they may look harmless, grounds can accumulate in pipes, harden over time, and contribute to clogs, especially in older plumbing or long runs of pipe.
Why coffee grounds can cause trouble
Coffee grounds don’t dissolve in water. They tend to stick to the inside of pipes, combine with grease, and form a sludge that narrows passages over weeks or months. In some homes, this can lead to slow drains or back-ups, particularly in the sink’s trap or in the main line.
Additionally, while a small amount might pass through, repeated dumping increases the risk. Garbage disposals can handle some food waste, but coffee grounds are often better disposed of in the trash or composting system rather than ground away.
Better disposal options
- Compos ... Read more »

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