15 Things You Should Never Pour Down Your Drain – Keep Your Pipes and the Planet Safe!

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Many people don’t think twice about what they pour down the drain, but certain liquids and substances can seriously damage your plumbing, harm the environment, and even lead to costly repairs. While it might seem like your sink can handle anything, some materials can build up in your pipes or contribute to pollution.

Being mindful of what goes down the drain can save you from major headaches in the future. To protect your home and the environment, here are 15 things you should never pour down the drain.

Cooking Oil

Cooking oils like vegetable, olive, or canola oil may seem harmless, but they can wreak havoc on your pipes. When oil cools, it solidifies, sticking to the walls of your pipes and causing blockages over time. 

This can lead to clogged drains and costly repairs. Instead of pouring oil down the drain, let it cool and dispose of it in the trash or take it to a recycling center. Keeping oil out of your pipes will help prevent clogs and keep your plumbing in top shape.

Grease and Fats

bacon fat
Image Credits: Depositphotos/bykofoto.

Like cooking oil, grease and fats from meat, bacon, or butter solidify when they cool, causing pipe blockages. Over time, these fats build up in your pipes, leading to slow drainage or complete clogs. 

Pouring hot water down the drain won’t help, as the fats eventually cool and harden again. The best way to dispose of grease is to pour it into a container, let it solidify, and then throw it in the trash. Your pipes will thank you for it!

Coffee Grounds

coffee grounds and beans
Image Credits: Depositphotos/NewAfrica.

Coffee grounds may seem small and harmless, but they are notorious for causing clogs in your drain. When combined with water and other debris, they form a thick sludge that can easily block pipes. 

Even if you have a garbage disposal, coffee grounds should never be poured down the drain. Instead, compost them or throw them in the trash. Using coffee grounds in your garden as fertilizer is another eco-friendly option.

Eggshells

Eggshells
Image Credits: Depositphotos/PixelsAway.

While eggshells may seem fragile, they can contribute to serious drain problems. When crushed, the sharp edges of eggshells can get caught in pipes and create blockages, especially when combined with grease or other debris. 

Many people mistakenly believe their garbage disposal can handle eggshells, but that’s not the case. Instead of tossing them down the drain, add them to your compost bin for a natural source of calcium.

Pasta and Rice

Pasta and Rice
Image Credits: Depositphotos/sirylok.

Pasta and rice are both foods that expand when exposed to water, even after cooking. When poured down the drain, they can absorb water and swell, causing blockages in your pipes. The starchy residue from pasta and rice can also create a sticky layer inside your plumbing. 

The best way to dispose of leftover pasta and rice is to throw them in the trash or compost them. This will keep your drains clear and prevent any future clogs.

Flour

person with flour
Image Credit: DepositPhotos nenetus

Flour might seem like an innocent ingredient, but when it mixes with water, it forms a thick, glue-like substance that can easily clog your pipes. Even small amounts of flour can create a sticky paste that builds up over time. 

Whether you’re cleaning up after baking or preparing a meal, make sure to dispose of flour in the trash rather than washing it down the sink. This simple step will save you from clogged drains.

Medications

pills or medicine
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Pouring expired or unused medications down the drain can be harmful to the environment. Water treatment plants are not equipped to filter out pharmaceuticals, which means they can end up in rivers, lakes, and even drinking water supplies.

Instead of flushing medications, take them to a pharmacy or a medication disposal site. This helps keep your local water sources clean and safe for everyone.

Paint and Paint Thinner

kid painting
Image CreditL DepositPhotos Kobyakov.

Paint, paint thinner, and other solvents contain toxic chemicals that can damage your plumbing and pollute the environment. Pouring these substances down the drain can contaminate water systems, harm aquatic life, and disrupt wastewater treatment facilities.

Always dispose of leftover paint and paint thinner at a hazardous waste disposal site. By doing so, you help protect your pipes and the planet from harmful chemicals.

Household Cleaners

woman with cleaning gloves on unhappy
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Many household cleaners, especially those with harsh chemicals, can be harmful to both your plumbing and the environment. Bleach, ammonia, and other cleaning agents can corrode pipes over time and contribute to water pollution when poured down the drain.

To safely dispose of these cleaners, check for hazardous waste disposal guidelines in your area. Opt for eco-friendly cleaning products to reduce your impact on the environment.

Produce Stickers

vegetables
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Those small produce stickers might seem insignificant, but they can cause big problems when they end up in your drain. These stickers don’t dissolve in water and can easily get stuck in pipes, contributing to blockages. 

When washing fruits and vegetables, be sure to remove the stickers and throw them in the trash. It’s a simple way to prevent clogs and keep your plumbing running smoothly.

Cigarette Butts

man smoking
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Cigarette butts are not only harmful to the environment but also to your plumbing. They don’t break down easily and can cause blockages in your pipes.

The toxic chemicals in cigarette filters can leach into water supplies and harm aquatic life. Always dispose of cigarette butts in the trash to keep them out of your drains and away from water sources.

Paper Towels and Wet Wipes

paper towels
Image Credit: DepositPhotos thodonal

Even though they may seem similar to toilet paper, paper towels and wet wipes should never be flushed or washed down the drain. These items don’t dissolve easily in water and can quickly clog pipes. 

Wet wipes, even those labeled as “flushable,” often contribute to major plumbing blockages. Dispose of them in the trash to avoid costly plumbing problems and protect your pipes from unnecessary damage.

Condiments and Sauces

sauces
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Condiments like ketchup, mustard, and sauces like mayonnaise or salad dressing can contribute to clogs when poured down the drain.

Many of these condiments contain fats, oils, and sugars that can solidify or create sticky residues inside your pipes. While it may be tempting to wash them down the sink, it’s better to scrape them into the trash to prevent any potential blockages.

Chemical Drain Cleaners

Chemical Drain Cleaner
Image Credits: Depositphotos/ekramar .

Ironically, many chemical drain cleaners can cause more harm than good. They may clear clogs temporarily, but their harsh ingredients can corrode your pipes over time.

In some cases, they may make clogs worse by solidifying the blockage further down the drain. Instead of using chemical cleaners, opt for natural alternatives like baking soda and vinegar or call a plumber to handle persistent clogs.

Dairy Products

milk bottles on fridge shelf in supermarket store

Milk, cream, and other dairy products may seem harmless, but when they enter the drain, they can contribute to fat build-up and sewer problems. Dairy can break down into fats and oils that stick to pipes, leading to blockages. 

Large amounts of dairy in the water supply can cause environmental issues. Instead of pouring dairy down the drain, dispose of it in the trash or compost small amounts when possible.

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Managing grocery expenses can be challenging for many households, especially with rising food costs and fluctuating budgets.

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