For a few days now, the water in your plumbing system has been draining with great difficulty. Bad odors are noticeable every time you shower. The kitchen sink is unusable due to stagnant water inside.
You come to the conclusion that your sewers are clogged. Faced with this situation, you don’t know how to proceed. Before looking for a solution, it is crucial to determine where the problem originates.
📋 In brief: Personally, I consider that 75% of drainage problems at home are caused by the daily accumulation of grease residues and hair. This situation can quickly clog your pipes if you don’t act at the first signs. A simple monthly maintenance prevents the formation of stubborn blockages effortlessly.
Causes of a clogged pipe

Due to your impatience, you wonder how to find a clog in a pipe. However, unclogging the water connection without knowing its origin is a waste of time. Worse still, it only makes the situation worse.
💬 Personal anecdote: Last January, I had to deal with a very unpleasant water backflow in my kitchen sink. A repairman charged me 120 euros to extract a compact mass of solid detergent and frozen food scraps. The lesson I learned is that you should always wipe your plates with a paper towel before rinsing them.
Common causes of clogged pipes
- Accumulation of grease: it solidifies and narrows the passage.
- Food scraps: trapped in the sink, they quickly form a clog.
- Hair and fur: the number one cause in showers and sinks.
- Objects accidentally dropped: jewelry, toys, cotton swabs, wipes.
- Limescale: reduces the diameter of pipes, especially in hard water areas.
- Poor slope of pipes: water stagnates and promotes clogging.
- Aging pipes: internal deposits, corrosion, wear.
So try to find the causes of this inconvenience. In most cases, it is our bad practices that cause this annoyance.
With misleading advertisements, we are used to throwing condoms, wipes, or sanitary tampons into the toilet. If we believe they dissolve in water, we are mistaken. These various objects end up blocking the pipes.
To go deeper, I recommend understanding our tutorial to know how to find a clog in a pipe which also provides useful leads. And to go further, the article explaining how to remove an object from a pipe offers interesting insight.
When taking a shower in the bathroom, it is almost impossible to avoid hair falling. Their accumulation often causes a water connection clog. Over time, they form a blockage and hinder water drainage.
For your kitchen sink, the pipe problem results from grease accumulating inside. Because of the cold, the substance solidifies and blocks the pipe’s operation.
Similarly, soap and food waste can also trigger this problem. If you plant a tree near your house, its roots risk breaking the buried pipes.
They take advantage of cracks to penetrate the pipe. When they grow there, they create a blockage and prevent water flow.
🌍 Did you know? Nearly 65% of emergency interventions for clogged pipes in urban areas are caused by the accumulation of solidified food fats that instantly harden upon contact with the cold walls of underground pipes.
Signs of a clogged pipe
| Main cause | Where does it occur? | Direct consequence |
|---|---|---|
| Fats and oils | Kitchen (sink) | Reduced passage, greasy clog |
| Food leftovers | Sink, dishwasher | Rapid obstruction |
| Hair and fur | Shower, bathtub, washbasin | Formation of fibrous clogs |
| Accidental objects | Toilet, washbasin, sink | Complete blockage |
| Limescale | General piping | Diameter narrowing |
| Incorrect pipe slope | Drainage network | Stagnant water, recurring clog |
| Aging pipes | All plumbing | Wear, deposits, fragility |
Pipe clogging does not appear suddenly. This issue gradually worsens until the water flow is completely blocked. That is why it is not easy to detect the problem in time.
If you notice that the water from your shower, toilet, washbasin, or sink flows weakly, you must act without delay. This slow drainage could be the result of a blockage inside the sewers.
If you want to know how to remove an object from a pipe, you can use a plumber’s snake. Remember to perform frequent and thorough cleaning of the system.
When the faucet distributes water discontinuously, it should warn you of the risk of a clogged pipe. A well-maintained installation ensures good water circulation.
If this is not the case, you need to dismantle and clean the siphon. This helps you detect the origin of the problem.
⚠️ Common mistake: Pouring large amounts of corrosive chemical drain cleaners based on caustic soda into a completely clogged pipe. If the product stagnates, the thermal reaction generated can deform or melt PVC plastic fittings, worsening the situation with a hidden leak.
Similarly, the presence of stagnant water is another sign revealing a clogged pipe. To set things right, it is recommended to pour boiling water into the drain. If the clog is made of grease, the hot water will dissolve it.
The use of a plunger is also recommended to dislodge it. This device creates a vacuum to move the water. When the water flows normally, it indicates the clog has disappeared.
Besides that, food residues cause clogging of your dishwasher pipes. To solve this problem, you can use a natural method.
The mixture of white vinegar and baking soda is one of the grandmother’s tips still widely used today. By letting it act for a few minutes, it allows the water to drain.
👍 Strengths
- Eco-friendly solution and safe for PVC
- Durably eliminates decomposition odors
- Negligible cost of less than 1 euro
🔻 Limitations
- Ineffective on already blocked solid objects
- Requires a minimum action time of 30 minutes
- Needs to be repeated regularly to remain effective

💡 Practical tip: Pour once a week one liter of very hot water mixed with two tablespoons of coffee grounds into your drains. This natural abrasive trick cleans greasy walls and instantly eliminates bad odors without any chemical product.
Contact a professional to unclog a pipe
You may have tried all the techniques mentioned above, but none showed good results. To avoid making things worse, nothing beats calling a specialist.
Their assistance is a guarantee of success. Thanks to their experience and knowledge, they will know how to apply the best method depending on the source of the problem.
The plumber is an expert in the field. The price of their intervention depends on the extent of the repair. But generally, you should expect between 100 to 200 €.
In case of a major unclogging, it is best to contact a drain cleaning company. Although their involvement incurs significant expenses, the results are not only effective but especially long-lasting.
The team works with specific equipment and professional tools such as mechanical snakes, a drain cleaning nozzle, and drain cleaning trucks. If you want to hire them, you need to prepare an amount between 300 to 1000 €.
FAQ – Clogged Drains
u003cstrongu003eWhy do my drains often get clogged?u003c/strongu003e
Because grease, hair, or deposits regularly accumulate. Preventive maintenance is necessary (hot water, baking soda, siphon cleaning).
u003cstrongu003eCan limescale really clog a drain?u003c/strongu003e
Yes, in hard water areas, limescale gradually reduces the diameter of pipes and increases the risk of blockage.
u003cstrongu003eHow to prevent drains from clogging?u003c/strongu003e
Do not pour grease down the sink, use hair filters, clean the siphons regularly, and run hot water to dissolve deposits.




