Sewer cleaning Switzerland - The complete guide

High-pressure flushing

The principle of this method is very simple: forward and backward water jets move deposits up and down, dirt and nozzles through the pipe. A lot can be achieved with varying pressures, nozzle geometries and operations - from grease to sand and soft incrustations. Advantages at a glance:

• Thorough and gentle on materials: No harsh chemicals, suitable for many pipe materials.
• Environmentally friendly: Water is used. The removed dirt is picked up in a controlled manner.
• Effective in bends and lengths: Even curved pipes can be reached with suitable hoses and nozzles.
• Good basis for diagnosis: After rinsing, the camera sees what is really going on.

Without the right nozzle and experience, the effect will fizzle out. Professionals select the pressure, flow rate and nozzle depending on the line and contamination.

Mechanical cleaning

Where water is not enough, mechanics eat their way through: Spirals, milling heads, chain extractors. They remove hard deposits, cut root carpets and loosen foreign bodies. Especially with old concrete crusts, mortar residues, solid lime rings or parts set in concrete, this is the only language the obstacle understands. When mechanics are a must:

• Root ingrowth across the cross-section.
• Incrustations that still remain after rinsing.
• Building residues/mortar that form a hard barrier.
• Offsets on joints that need to be exposed in order to assess the situation.

After the mechanics, a rinse is required. Otherwise chunks will remain and create the next blockage a few meters further on.

Dry cleaning

At first glance, chemicals seem like a quick shortcut - in practice, they are tricky. In narrowly defined situations, grease-dissolving or specially formulated agents can help if the material, position and load allow it. However, the disadvantages often outweigh the advantages: Many products attack seals, generate heat and gases, are risky to handle and pollute water. They often only dissolve the surface, while the actual cause - such as hard incrustations or root ingrowth - remains. For this reason, the rule is to work mechanically or hydrodynamically first, using chemicals only rarely, in small doses and professionally - with clean documentation. In households, aggressive drain cleaners are not a solution, but a risk. In our work, we very often find that, despite grease traps, faults regularly occur in the kitchen drainage system. Instead of using stronger cleaning agents, companies should switch to systematic maintenance:

• Scheduled maintenance of grease traps,
• Preliminary rinsing with hot water at the end of work,
• Regular high-pressure rinsing with replacement of the nozzles depending on the area.

As a result, the pipeline functions stably and no chemical agents are required. The general trend is simple: diagnosis before measures, water and mechanics before chemical agents. If the expert use of chemical agents really makes sense, it is done in a controlled manner - with suitable protective equipment, clear dosing, neutralizing after-treatment, sufficient flushing and complete documentation (camera before and after the intervention, log with product, quantity, time and section). This not only keeps the line clear for a short time, but also identifies and eliminates the actual cause.

Modern technologies in sewer cleaning

The best cleaning is of little use if you don't know where and why it's stuck. Properly selected technologies and documentation confirm this beyond doubt:

• Camera inspection: When experts use this method, cracks, misalignments, roots, foreign bodies and deposits are detected with high-resolution cameras.
• Localization systems: Probes with transmitters indicate depth and position. Practical when locating shafts under pavement, marking problem areas or planning selective excavations.
• Robotics: Milling robots work precisely in larger nominal widths. They cut roots, open inlets after inliner renovations and clear away hard obstacles that cannot be reached from the roof.
• Data documentation: Pictures, videos, logs - neatly labeled by route, direction, time. This saves discussions and helps with insurance claims.

First see, then act properly. If you know the line, you can make more targeted and favorable decisions.

Procedure for professional sewer cleaning

Safety first. Before entering manholes: shut off, ventilate, measure gas. In traffic areas: Secure them. This is followed - if passable - by a preliminary inspection with a camera. It shows the position, material, cross-sections, bends, branches and the degree of contamination. In some cases, it is necessary to carry out a short pre-cleaning so that the camera can be inserted. This is an optimized procedure that guarantees that nothing is overlooked or insufficiently documented:

• Create access points: Inspection openings, shafts, downpipes. Where nothing is available, openings must be made with care.
• Pre-rinsing: Loosens soft deposits, creates visibility and gets material moving.
• Mechanical processing (where necessary): Spiral, milling head, chain slinger - adapted to material and cross-section.
• Rinsing: Rinses off dissolved material completely.
• Intermediate check: Camera checks the intermediate status, uncovers hidden problem areas.
• Manhole and inlet cleaning: What reaches the top has to go out - otherwise it goes back into the pipe.
• Function check: test odor traps, backflow flap, visible inlets.

These steps are teamwork. The rinsing driver controls the pressure and flow, the technician guides the nozzle or tool, the camera documents. The end result is more than just a „free impression“ - there are documented results. Finally, there is the TV follow-up check. It shows whether the pipe is continuous and whether the cause has really been eliminated. The cleaning log summarizes: Date, section, methods used, findings, video/photo links, recommendations (interval, spot repair, remediation). This document saves time and discussion in the event of later questions - especially between the owner, management, insurance company and tradesmen.

Costs of sewer cleaning in Switzerland

No reputable provider calls out all-inclusive prices for complete networks over the phone. The costs are incurred on site. Nevertheless, it is possible to explain transparently what the costs depend on:

• Accessibility: Are there inspection openings? Are shafts exposed? Do coverings have to be removed or obstacles moved out of the way? The easier the access, the faster the work. Good access saves time on every job.
• Cable length, diameter, material: DN 70 in the bathroom reacts differently to DN 250 in the yard area. Longer sections mean more flushing time and more documentation. Effort scales with distance and nominal diameter.
• Degree of soiling: Soft grease and sludge are removed faster than concrete crusts or root carpets. Mechanics and robotics increase the time and equipment required. The harder the surface, the more important the diagnosis.
• Time slot: Nights, weekends, public holidays - emergency services are more expensive. Prevention saves surcharges.
• Region/Approach: Area of operation, travel time, parking and traffic situation. Urban and rural areas have different logistics.
• Additional services: TV protocol, leak test, localization, robotics, renovation milling - all traceable, if justified and documented.

Many companies offer a Free preventive check-up clearly defined what this entails (e.g. visual check at the accessible point, short tracking shot). This is not a loss-leader offer, but an honest way of realistically assessing what was needed. The trick is to clearly define what is free, what incurs additional costs and when. Explaining costs and providing evidence of results creates trust - and saves on inquiries. At Kanalhelden, simpler cleanings cost from around CHF 250. More complex jobs can incur costs in the three-digit to low four-digit range. With Kanalhelden, you always receive a transparent quote in advance - with no hidden costs.

Sewer cleaning in Swiss cities and cantons

The basics are the same everywhere, but the framework conditions vary:

• Topography: Slopes accelerate the flow, valleys favor sedimentation. Cities with large differences in height experience different load cases than plains. Consequence: Match the interval and method to the location.
• Age of the nets: Historic neighborhoods often have smaller cross-sections, mixed systems and older materials. New development areas are more structured, but not automatically problem-free. Old buildings require more diagnosis, not just more pressure.
• Vegetation: Streets with many trees have more root ingrowth. Seasonal leaves increase the need to clean the inlets.
• Climate: Heavy rainfall events may increase locally. Snowmelt plays a role in mountain regions. If you know the peak loads, you can plan smarter.

Whether in Zurich, Berne, Basel, Winterthur or Lucerne - the planning follows the same pattern: inventory, interval, clear responsibilities, documentation. Private owners are responsible for their pipes and house connections, municipalities/municipal utilities for the public sewers. There are municipal and cantonal specifications as well as industry standards. More important than the standards, however, is that the pipes are immediately functional, i.e. they must be ready for operation. This can only be ensured through maintenance contracts or frequent inspections.

Prevention and maintenance

Prevention can be planned. For detached houses, a check every 2 to 3 years is often sufficient. It is recommended to carry out a further visual inspection of the camera after construction work or a close-up inspection after heavy rainfall. If you document regularly, you will recognize trends: Where does something keep settling? Where are roots penetrating? In this way, targeted action can be taken instead of widespread flushing.

Home remedies and what to avoid

Small aids have their place - they don't replace professional work, but they can make everyday life easier.

• Hot water: Helpful in the kitchen as a preventative measure against greasy films. It dissolves, but does not prevent large deposits.
• Vinegar and baking soda: Damp odors and help with light biofilms. They are too weak against real blockages.
• Mechanics on a small scale: Hair trap strainers, siphon cleaning, regular maintenance of bathroom drains.

Avoid aggressive drain cleaners: They attack materials and seals, generate heat and gases and are particularly risky if they are later professionally flushed with high pressure. Pushing through with wire or coat hangers is just as problematic, as such improvisations scratch and damage pipes and exacerbate the problem. And very important: please do not throw everything into the toilet - wet wipes, cotton buds and grease belong in the waste, not in the pipe.

Selection of a suitable sewer cleaning company

The quality of work should be clearly demonstrated by established service providers by showing the following:

• Experience and references: Public accessibility and transparent references.
• Methodology: Use of state-of-the-art flushing technology, adequate nozzles, camera, localization, robot if required.
• Transparent communication: Procedure, alternatives, possible risks - clearly explained.
• Documentation: Video, photos, protocol - structured and comprehensible.
• Safety culture: Safeguarding, gas measurement, PPE - if you're serious, you work safely.

Trust arises from clean work and a clear explanation - the two belong together.