What is outdoor sewerage and when do you have it unclogged?
The external sewer system is the complete network of pipes, tubes, and connections that transports rainwater and wastewater from your home, through your garden, driveway, or yard, to the main sewer under the street. Maintaining and unblocking this external sewer system is essential for every home, business, or organization. If water in your garden drains stops draining, the downspout overflows, or the indoor toilet doesn't flush properly, there's a good chance the blockage is external. A foul-smelling sewer smell around your house or water on the street after a rain shower are also warning signs that the external drain is blocked. Ontstoppen.nl is available day and night to professionally unclog that outside sewer.
- Blockage due to root growthTrees and plants use their roots to find water, which can cause them to enter pipes in the garden.
- Accumulation of dirt and leavesEspecially in autumn and winter, drains and pipes quickly become clogged by leaves, sand and street dirt.
- Damage due to subsidence: Ground subsidence or construction work can cause pipes to burst, resulting in leaks and blockages.
- Back-up due to fat and residues: Kitchen grease, paint residues or other waste solidify and stick in horizontal sewer pipes outdoors.
How does unclogging outside sewers work? Ontstoppen.nl
Every blockage requires customized maintenance. Our professional team utilizes technology such as high-pressure unblocking machines and sewer inspection cameras. This allows us to quickly pinpoint the exact location of the blockage in rural areas without unnecessary digging. By flushing or mechanically cleaning the pipe, we ensure the water flows again and the problem is truly solved.
- Determine causeWith a camera inspection or a sewer probe, we immediately check where and why the pipe is blocked.
- Cleaning with high pressureHigh-pressure water jets completely remove sand, roots, grease and other contamination from the outside sewer.
- Emptying the cleaning pit or manholeIf the blockage is concentrated at one point, we will completely empty the drains and holes.
- Follow-up and prevention tipsAfter unblocking, we use the camera to check whether everything is really clean and advise you on how to prevent recurrence.
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.
Types of blockages in the outdoor sewer system
Outdoor sewerage includes many types of drains and connections around the home or business premises. Depending on the location and function, various problems can arise that require a specific approach. Consider these:
- Rainwater drain blockageIs rainwater no longer draining through the downspout or drainpipe? Leaves, sand, and moss are often the culprits, causing flooding or damage to walls.
- Outside drainage blocked: Especially in damp gardens or after renovations, drainage pipes can become clogged, causing water to not drain properly and the lawn to become flooded.
- Main sewer clogged outsideIf the blockage is in the central pipe to the main sewer, you will often notice this because several drains are malfunctioning or making gurgling noises at the same time.
Process: This is how we tackle an external sewer blockage
Our professionals always follow a structured step-by-step plan, so that your outdoor sewer system quickly works optimally again and future blockages are prevented as much as possible. We use Ontstoppen.nl Clear communication and fixed prices, so you'll never be faced with surprises afterwards.
- Telephone consultation and assessment: You can give us your details by phone or WhatsApp (085 2505 217) or by email (info@ontstoppen.nl) assess the situation. We'll immediately assess what equipment is needed and schedule an appointment right away.
- On-site inspectionWe examine the external sewer system with a sewer camera or locating device and determine the precise cause and location.
- Unblocking with professional equipment: We use a high-pressure jet or spring machine to remove roots, sludge, grease, or sand, allowing the water to flow smoothly again.
- Recovery and tailor-made adviceIn the event of pipe damage, we identify repair options and provide tips on future maintenance.
Preventing problems with outdoor sewerage
By carrying out timely maintenance and being alert to signs of blockage, you can prevent serious damage and expensive repair costs. Ontstoppen.nl We recommend having the drains and pipes around your home inspected regularly. Especially if you live in an area with lots of trees or old sewer pipes, a periodic inspection can save you a lot of trouble.
- Regularly clean drains and wellsRemoving leaves, branches and sand from the drains keeps the drain clear and prevents blockages in the outside sewer.
- Watch out for grease and large pieces of waste: Do not dispose of grease, oil, paint residue, or solid materials in outdoor drains. These substances quickly adhere to the pipe wall.
- Sewer inspection in case of problems: If you notice signs such as bubbling sounds, odors, or water not draining properly, have an inspection carried out immediately.
Ontstoppen.nlExpert in unblocking outdoor sewers throughout the Netherlands
With a nationwide service team and branches throughout the Netherlands, Ontstoppen.nl Always fast and expert help with unblocking outdoor sewers. Whether you have a blockage in a garden in Amsterdam, a home in Rotterdam, or a business premises in Utrecht, our team is available 7 days a week. We work entirely according to the latest sewer management standards, as stipulated in the Water Supply Act, and the recommendations of the RIONED foundation. Our rates are always transparent, with a no-win, no-fee guarantee, a fixed rate, and professional equipment included.
For immediate help with a blockage or to have your drain unclogged rain pipe or other outdoor drainage you can rely on Ontstoppen.nlWe work quickly and effectively from the Amsterdam region. Find out more on our page. specialist in unclogging sewers in Amsterdam.
Would you like to know exactly how much it will cost to have your outdoor sewer professionally unclogged, or would you like to receive a clear, no-obligation quote within 24 hours? Request your customized quote here and we will contact you the same day.
For more information, free telephone advice or an appointment, please contact us on 085 2505 217, WhatsApp or email info@ontstoppen.nlWith us, you get an 8-week warranty, a single all-inclusive rate, a solution within 24 hours, and no unexpected costs. Discover why our approach has already freed thousands of households, businesses, and institutions from blocked outdoor drains across the country.
Frequently asked questions
How do you recognize a blockage in the outdoor sewer?
A blocked outdoor sewer line is usually noticeable when multiple drains in your home drain slowly or start bubbling. Water doesn't drain properly when flushing the toilet or emptying the sink. During heavy rainfall, water can even rise above the manhole covers, leaving puddles in the garden. Sometimes you'll notice a sewage smell around the outdoor drains; this is often a clear sign that something is wrong with the system.
Delaying action can quickly lead to bigger problems, such as odors, leaks, water that can no longer drain, or even serious damage to the paving around your house. Recognize these signs? Then it's wise to call in professional help quickly. Want to know more about clearing a blocked sink? Read more about the approach to sink blockage.
What are the most common causes of a clogged outdoor sewer?
Outdoor sewers often become clogged by a buildup of grease, tree roots, toilet paper, sand or gravel, and sometimes even by subsidence. Especially in older homes, sewers can age to the point that they become vulnerable to cracks or root growth from the garden. Greasy kitchen debris flushed down the drain can also settle against the walls of the pipes and form a blockage.
In addition, flushing non-biodegradable materials, such as wet wipes, sanitary napkins, or diapers, can clog the sewer system. This type of waste doesn't belong in the sewer and causes serious blockages, often in combination with existing contamination. If in doubt, always have a specialist take a look to determine the exact cause. Are you wondering how we can help? Ontstoppen.nl Want to solve a stubborn drain blockage with professional equipment? Then take a look at solve persistent drain blockage.
What are the steps involved in having the outside sewer unclogged?
When you call on us to unclog your outdoor sewer, we always start with a thorough inspection. We often do this with a special sewer camera to precisely locate the blockage and determine the cause. This prevents unnecessary demolition work in the garden or paving and allows us to address the problem directly. Depending on the situation, we use powerful high-pressure jets or sewer suction machines to clear the blockage quickly and effectively.
After clearing the blockage, we'll test whether everything is flowing properly again and offer free advice to prevent future blockages. We offer a fixed, all-inclusive rate, with no surprises. Want to learn more about unblocking a specific indoor drain? Read on to learn more. Have your drain blockage resolved professionally.
What are the costs for unblocking the outside sewer at Ontstoppen.nl?
For unblocking a single blockage in the outdoor sewer system, we charge a fixed rate of €169,50 including VAT. For main sewer systems or persistent blockages requiring additional equipment, our all-inclusive flushing rate of €296,45 applies. This includes professional unblocking equipment, labor costs, and call-out fees. Regardless of the time it takes, you always pay this fixed amount, so you'll never encounter any financial surprises.
We also offer an 8-week warranty on our work. If it turns out that part of the sewer needs to be replaced, we'll discuss a transparent price upfront so you know exactly what to expect. Our service is available within 24 hours and at Ontstoppen.nl Always applies: no cure, no pay. Interested in a professional toilet unblocking service? View now our toilet unblocking service.
What can you try yourself before having the outside sewer unclogged?
For minor blockages, you can try to dislodge the debris yourself using a sturdy plunger via the accessible drain outlet on the outside of your house. You can also carefully flush the pipe using a garden hose and sufficient water pressure. Avoid using chemical drain cleaners; they rarely solve the problem and can actually damage the sewer system and the environment.
If the blockage keeps coming back or worsens, call a professional as soon as possible. Tackling it yourself may seem cheaper, but in practice, it often leads to greater damage and additional costs. In the case of a serious blockage or recurring problems, we will take care of it. Ontstoppen.nl for a lasting solution with a guarantee, regardless of the complexity of the problem.
