Your plumbing system is designed to handle water, soap, and small amounts of biodegradable waste—nothing more. But many everyday items can cause clogs, pipe damage, or even sewer backups when they go down the drain. Avoiding these materials is one of the simplest ways to protect your plumbing and prevent costly repairs.
Here’s what should never go down your drains and why it matters.
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1. Grease, Oils, and Fats
Grease may go down as a liquid, but it cools and hardens inside your pipes.
This leads to:
- Thick buildup
- Narrowed pipe openings
- Slow drains
- Full blockages
Instead, pour cooled grease into a container and throw it away.
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2. Coffee Grounds
Coffee grounds clump together when wet, forming dense blockages.
They’re one of the most common causes of:
- Kitchen sink clogs
- Garbage disposal jams
- Slow drains
Dispose of them in the trash or compost instead.
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3. Eggshells
Eggshells don’t break down easily and can combine with grease to form stubborn clogs.
Even if you use a garbage disposal, the membrane inside the shell can wrap around the blades.
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4. Flour and Dough
Flour expands and becomes sticky when mixed with water.
This creates:
- Paste‑like buildup
- Thick pipe coatings
- Hard‑to‑remove clogs
Always throw flour and dough scraps in the trash.
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5. “Flushable” Wipes
Despite the label, most wipes do not break down like toilet paper.
They can cause:
- Toilet clogs
- Sewer line blockages
- Septic tank issues
Stick to toilet paper only.
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6. Cotton Balls, Swabs, and Pads
These items absorb water and expand, making them perfect clog‑creators.
They can get stuck in:
- Toilet traps
- Pipe bends
- Sewer lines
Dispose of them in the trash.
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7. Hair
Hair is one of the biggest contributors to bathroom clogs.
It:
- Wraps around drain components
- Forms nets that trap soap scum
- Creates dense blockages
Use a drain catcher to prevent hair from entering the pipes.
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8. Harsh Chemical Cleaners
Chemical drain cleaners can damage:
- PVC pipes
- Rubber seals
- Metal components
They may clear a clog temporarily but often cause long‑term damage.
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9. Paint, Solvents, and Chemicals
These substances can:
- Damage pipes
- Harm septic systems
- Contaminate water supplies
Dispose of them at a local hazardous waste facility.
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10. Food Scraps That Don’t Break Down Easily
Avoid putting these down the drain:
- Pasta
- Rice
- Potato peels
- Fibrous vegetables
- Fruit pits
They expand, tangle, or jam disposals.
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⭐ Related Guides
Clogged Drain? 5 Safe Fixes That Don’t Damage Your Pipes
Slow Drains in Your Home? Here’s What to Check Before Calling a Plumber
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⭐ External Resources
EPA – What Not to Put Down the Drain
WaterSense – Protecting Your Home’s Plumbing
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