The 10 most common causes of blocked drains - and how to avoid them
- Martin Schlaffer
- Apr 1
- 2 min read
Updated: 2 days ago
A blocked drain can quickly become an annoying and expensive affair. However, such problems can often be avoided by taking preventative measures. Here are the ten most common causes of pipe blockages and tips on how to keep your drains keep your drains clean.

1. Leftover food
Food scraps do not belong in the down the drain! Starchy foods in particular, such as rice or pasta, swell up and swell up and lead to blockages.
Tip: Use a drain strainer in the kitchen and dispose of leftover food in the bin or organic waste garbage can.
2. Grease and oil
Grease and cooking oils settle on the inner walls of the pipes and gradually gradually constrict them.
Tip: Pour fats and oils into an old container and dispose of them in the residual waste.

3. Hair as a cause of blocked drains
Hair is one of the biggest enemies of your bathroom drain. It gets caught in the pipe and forms a dense clog with soap residue.
Tip: Use a hair strainer in the shower and sink to catch hair.
4. Soap residues
Grease-based soaps in particular can cause deposits.
Tip: Rinse the pipes regularly with hot water to remove soap residue.

5. Hygiene articles and wet wipes
Wet wipes, cotton buds or feminine hygiene products do not decompose and can completely block pipes. They are one of the most common causes of blocked drains.
Tip: Always throw such items in the bin and not down the toilet.
6. Limescale deposits
Over time, hard water can leave limescale deposits in the pipes.
Tip: Descale your pipes regularly with a pipes with a mixture of vinegar and baking soda or use a water softener. You can find out what other household remedies help against blocked pipes in our blog post “Home remedies for blocked pipes: what really helps?”.

7. Cat litter
Some people dispose of cat litter in the toilet, which can have fatal consequences. Cat litter clumps and hardens in water.
Tip: Always dispose of cat litter in the residual waste!
8. Foreign objects
Toys, dental floss or even small pieces of jewelry can accidentally end up in the drain.
Tip: Be careful and use drain plugs to prevent small objects from entering the pipe.

9. Root ingrowth
In older pipe systems, tree roots can penetrate the pipes and cause massive blockages.
Tip: Have your pipe system regularly with a camera inspection. You can find more detailed information on this in our article “How does a TV camera inspection work?”.
10. Building materials and paint residues
Cement, plaster or paint residues do not belong in the drain, as they harden there and lead to complete pipe blockages.
Tip: Dispose of building materials properly at recycling centers or special collection points.
Conclusion on the 10 most common causes of blocked drains
With the right care and attention, many pipe blockages can be avoided.
If your drain does become blocked, we will be happy to help you, simply make an appointment!
Do you need help? Please feel free to contact us at any time on +49 (0) 1577 499 54 47
or send an e-mail to service@aaaabfluss.de.