5 Things NOT To Put Down Your Sink

Many people treat their kitchen sink like a trash can, thinking that anything going down the drain will simply disappear and cause no harm. But what they don’t realize is that this habit can lead to serious plumbing problems down the line.

It’s only when you face a clogged sink that you start to understand the consequences of what you’ve been flushing away. The drainage system is a critical part of your home's plumbing, and neglecting it can result in costly repairs and inconvenient messes.

To keep your drains flowing smoothly and avoid expensive plumber visits, here are 5 things you should never put down your kitchen sink.

1. Food Waste

It’s easy to just toss leftovers down the drain while washing dishes, but this can lead to major blockages over time. Small food particles may seem harmless, but they can accumulate and create clogs in your pipes.

Some of the most common culprits include:

  • Oily foods
  • Starchy items like pasta and rice
  • Corn husks
  • Eggshells
  • Bones
  • Bacon grease
  • Potato peels

Pasta and rice, in particular, absorb water and expand inside the pipes, creating a sticky, hard-to-remove blockage. Always scrape excess food into the trash before rinsing your dishes.

food scraps in kitchen sink

Excess Flour

Flour can also be a problem. It tends to clump together in the pipes, leading to slow drainage or complete blockage. Make sure to throw any leftover flour in the trash instead of down the sink.

2. Cooking Oils and Fats

Pouring oil or grease down the drain is one of the worst things you can do. Even when cooled, these substances can solidify and clog your pipes over time.

The best way to dispose of cooking oil is to let it cool, then pour it into a sealed container and throw it in the trash. This simple step can save you from expensive plumbing issues later on.

3. Produce Stickers, Paper, and Packaging

It’s common to peel off fruit stickers while washing produce, but those little pieces can get stuck in your pipes and cause blockages. Same goes for small bits of paper or packaging—never flush them down the drain.

Always dispose of these items in the bin to protect your plumbing system.

4. Coffee Grounds

Although some people believe coffee grounds help clean drains, they actually form thick, stubborn sludge that can clog your pipes. If you have a compost bin, use it instead of throwing grounds down the sink.

coffee beans

5. Paint and Chemicals

Paints, solvents, and other harsh chemicals should never go down the drain. They not only damage your pipes but also pollute the environment. Always check local guidelines for safe disposal methods.

Bonus: Milk and Dairy Products

Milk, yogurt, and cheese can also cause problems. These liquids have high oxygen demand and can lead to bacterial growth and foul odors in your pipes. Always throw dairy products in the trash, not down the sink.

the top sections of numerous cartons of milk

So, What Can I Put Down My Kitchen Sink?

Stick to water and soap. Anything else—like food scraps, oils, chemicals, or paper—should go in the trash. Proper disposal helps keep your drains clear and your plumbing in good shape.

What About Garbage Disposals?

Garbage disposals can handle some food waste, but they’re not a solution for everything. Grease, coffee grounds, and starchy foods can still clog your pipes. Use the disposal wisely and always follow proper waste management practices.

Should I Get a Compost Bin?

A compost bin is a great idea. It allows you to recycle organic waste like coffee grounds, fruit scraps, and vegetable peels. Not only does this reduce drain clogs, but it also helps improve your garden soil.

What Should I Do If My Drains Are Clogged?

If you suspect a clog, don’t try to fix it yourself unless it’s a minor issue. In many cases, professional help is needed. A licensed plumber can use tools like drain snakes or hydro-jetting to clear even the toughest blockages.

Please note: This information is for general guidance only. Regulations vary by location, so always consult a professional or local authorities before making any plumbing changes. See our Terms & Conditions for more details.

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