We understand that you'd rather get back to washing dishes and cooking quickly and hassle-free. That's why we share smart tips and practical solutions that really make a difference when dealing with a clogged drain, siphon, or pipe system.
Want to know how others rate our approach and why we stand out in the sink unclogging industry? Feel free to check out our customer experiences at Ontstoppen.nl and read the 5/5 Google reviews.
What is sink unclogging and why is it essential?
A sink serves as a daily drain for water, food waste, grease, and soap. If you notice that the water in your sink is draining slowly or is completely blocked, you're often dealing with a clogged sink. Unclogging a sink involves removing blockages in the drain, allowing you to have water flowing smoothly again without the risk of flooding or unpleasant odors. Ontstoppen.nl We understand better than anyone how annoying such a blockage is and how important a quick solution is for your household.
Blockages often arise from a buildup of grease, food debris, limescale, hair, and other materials that accumulate in bends and pipes. Without professional treatment, you risk a persistent blockage or even damage to your pipes.
- Grease build-up in the pipeFats, oils, and food residues solidify in the drain, narrowing the passage. For example, after cooking meat, grease residue is flushed down the drain.
- Limescale depositsIn areas with hard water, limescale adheres to the inner wall of the drain, reducing its diameter. Think of whitish deposits around the drain.
- Accumulation of food residuesSmall fruits, pasta, and potato peels get caught in the pipes and create a bottleneck. Even small amounts can cause major problems.
- Incorrect use of resourcesUsing aggressive agents can damage pipes and worsen blockages. We often see damage caused by the wrong drain cleaners.
How to unclog a sink: professional techniques explained
At Ontstoppen.nl We use professional equipment such as a spring machine, pressure washer, or suction pump. Every blockage requires a unique approach. We follow a transparent and targeted step-by-step plan to ensure the root cause is addressed sustainably.
- Trace causeFirst, we investigate the exact location and nature of the blockage using inspection cameras or detection equipment.
- Manual removal: We use a drain snake or extension spring to easily remove dirt build-up without damaging the drain.
- High pressure cleaning: We use a sewer rat to spray off the residue under high pressure, ideal for stubborn grease or limescale deposits.
- Aftercare and adviceAfter clearing the blockage, we check the free flow and provide advice to prevent future blockages.
How we work
How we work
Report a blockage (without obligation)
Tell us where the blockage is (drain, plumbing, toilet, or sewer). We'll immediately analyze the situation by phone, WhatsApp, or form.
Free quote
You'll receive a clear, all-inclusive price for unblocking—including call-out fees, labor, and a no-win, no-fee policy. No surprises.
National coverage
Our certified sewer specialist often arrives the same day. We unclog drains without any demolition work, using professional equipment.
Unblocking & warranty
We'll fix the blockage, inspect all pipework, and offer an 8-week warranty. Safe, durable, and professional.
Our professionals work daily throughout the Netherlands and know exactly what the most effective approach is for every type of sink blockage, whether it's in a 1930s house in Haarlem or a new-build apartment in Amsterdam.
Types of blockages and common problems in the sink
Clogs manifest themselves in various ways. Sometimes you notice them as slow draining water, a gurgling sound, or a foul sewer smell. The most common types of sink blockages are:
- The local blockage: A plug of grease or food debris directly under the sink, often a quick fix.
- The pipe blockageDeeper in the drain, caused by long-term buildup of dirt, limescale, or hair. This requires professional tools.
- Blockage in the siphon (swan neck)Grease, hair, and food debris often accumulate here, which can be recognized by standing water in the sink. Cleaning or disassembling the siphon is the solution.
- Ventilated pipe clogged (secondary sewer system): Occurs in older houses with complex sewer systems. Symptoms include a gurgling sound and a foul odor from the drain.
Are you experiencing problems that indicate a deeper sewer blockage, such as overflowing water or backflow into other drains? Then read more about immediately solving a clogged drain.
Products, tools and scientific techniques for unclogging a sink
We distinguish ourselves by using professional and certified techniques, such as high-pressure cleaning, spring machines, and camera inspections, as provided by companies like Ridgid and Rothenberger. Laboratory analyses, as described in knowledge databases (Wikipedia, Wikidata), confirm that high-pressure cleaning is the most effective and safe method for thoroughly cleaning drain pipes without causing damage.
- High pressure washer: A backward-spraying nozzle loosens and removes caked-on dirt, as used in professional sewer cleaning.
- Sewer spring (mechanical cleaning): The coil spring reaches deeper blockages and turns plugs out of the pipes.
- Camera inspection: A mini camera in the drain allows us to detect damage, cracks or stubborn blockages without any cutting or breaking work.
- Eco-friendly solutions: New techniques use enzymes that biodegrade organic waste without harming the environment.
We only use equipment that complies with the standards described in NEN-EN 13564 (backflow preventers) and the ScienceDirect protocols for sewer inspections.
Preventing clogging: tips and maintenance instructions
The best course of action is to prevent your sink from clogging again. That's why we always offer advice tailored to your living situation, for example, in Utrecht or Rotterdam, where water hardness and sewage systems can vary.
- Do not flush grease down the drain: Grease and oil solidify in the pipe and cause a blockage in the siphon.
- Do not flush coffee grounds or shavings down the drain: These materials are not soluble and together with soap they form a stubborn plug.
- Use a sieve: Easily prevent food scraps from entering the drain.
- Flush regularly with hot waterThis prevents the build-up of soap residue and incipient grease deposits.
If you unexpectedly encounter a blockage in multiple drains, such as in the bathroom, please see our page about Have your bathroom drain unclogged quickly and professionally.
Unclog sink by Ontstoppen.nl: benefits and our approach
At Ontstoppen.nl Affordability, transparency, and speed are paramount. We always charge a fixed rate of €169,50 (including VAT) per single blockage, or €296,45 all-in for a main sewer blockage, excluding additional labor costs. We always offer an 8-week warranty and a no-win, no-fee policy. Our technicians use high-quality, certified drain cleaning equipment, ensuring a future-proof solution. Whether it's unblocking your sink, preventatively cleaning your entire drain, or solving complex sewer problems, we're available daily throughout the Netherlands.
Do you need your sink unclogged urgently and want to know immediately what you can do? Then request a quick and easy quote. a quote within 24 hoursQuestions about our approach? Feel free to contact us at 085 2505 217, WhatsApp, or email us at info@ontstoppen.nlWe offer fast service, fair rates, and the expertise to ensure a permanently clean drain.
Frequently asked questions
How can you unclog a sink yourself if the water no longer drains?
If your sink isn't flushing anymore, you can first try using a rubber plunger to loosen the blockage. Place the plunger over the drain, press firmly, and pull it up and down several times with force. This will create suction that can dislodge the blockage. Don't forget to remove any soap residue or hair around the drain first to prevent it from being pushed back into the pipe.
If the drain unblocker isn't effective enough, you can try baking soda and hot water. Pour a cup of baking soda down the drain and rinse with boiling water. Repeat this a few times. If the problem persists or you notice unpleasant odors, there's often a deeper blockage that's difficult to clear yourself. In that case, it's wise to seek professional help. Read more about this, for example. the specialist sink drain unclogging service van Ontstoppen.nl.
What most often causes a clogged sink?
The most common cause of a clogged sink is a buildup of grease, food particles, and soap in the drain. Small amounts of oil, grease, coffee grounds, and food often end up in the sink unnoticed, and together with hair and soap scum, form a stubborn blockage in the pipe. This is especially noticeable in heavily used sinks in kitchens or bathrooms.
Other culprits include objects like toothpicks, cotton swabs, or a piece of plastic accidentally dropped into the drain. Limescale or a poorly draining siphon can also sometimes cause a blockage. Regularly flushing with hot water and not pouring grease down the sink reduces the risk of blockages. In persistent cases, you can professional grease removal in case of blockage have it carried out by Ontstoppen.nl.
When do you call a professional sink unblocking company?
If you notice that your sink keeps getting clogged, the water barely drains away or even backs up into other drains, then it is time to call a professional drain cleaning company like Ontstoppen.nl to be activated. This often indicates a deeper blockage in the main sewer or a burst pipe. Our experts can use professional equipment such as a spring machine, pressure washer, or camera inspection to precisely locate the blockage and resolve it without damage.
In addition, offers Ontstoppen.nl Fixed prices and a no-cure-no-pay guarantee mean you'll never encounter any surprises. Thanks to our fast service, you'll be helped within 24 hours, and you'll enjoy an 8-week warranty on the unblocking, so you can be sure the problem is truly solved. Did you know we also specialize in solving persistent drainage problems?
Is chemical drain cleaner safe to use in the sink?
Chemical drain cleaners may seem convenient at first, but they're not without risks to your pipes and the environment. These products often contain harsh chemicals that can damage plastic and rubber, causing leaks. They also pose a health hazard if inhaled or touched, and they don't clear larger or deeper blockages in your sewer system.
Moreover, chemical drain cleaners rarely offer a permanent solution. It's better to use a plunger, baking soda with hot water, or specialized equipment from a professional company. If you want to work sustainably and avoid the risk of damage, always choose a professional drain cleaning service – Ontstoppen.nl even advises this if there are recurring blockages.
How much does it cost to have a sink unclogged? Ontstoppen.nl?
At Ontstoppen.nl You always know where you stand: for a single clogged sink, we charge a fixed rate of €169,50 including VAT. This all-inclusive price includes call-out charges, labor, and the use of professional drain cleaning equipment. The price remains the same, regardless of the time our technicians need to complete the job, guaranteeing no unexpected costs.
If you're dealing with a larger blockage in your main sewer that's affecting multiple drains, we offer an all-inclusive flushing rate of €296,45. We also guarantee 24-hour service and offer an 8-week warranty on the unblocking work. This way, you always know exactly what you're paying for and are assured of an effective, long-lasting solution.
