Sewer cleaning at a glance - technology, prevention, special cases

Sewer cleaning sounds like one of those tasks you'd rather not even think about. As long as the water drains away, everything is fine - right?
However, it is precisely this attitude that means that problems often only become apparent when it is already too late. Overflowing shafts, blockages, unpleasant odors in the cellar.
And then? Then action has to be taken quickly - and it often gets expensive.

We see things a little differently. For us, drain cleaning is not just an emergency service, but part of ongoing maintenance. Just like you check a roof before it leaks or service the heating before it breaks down in winter. Prevention instead of panic - that's the basic idea.

What exactly is drain cleaning?

In simple terms, sewer cleaning refers to all measures used to remove deposits, blockages or other faults in wastewater pipes and sewers. This can be a small house connection, a street collector or a large sewer in which you could be standing.
The methods range from classic high-pressure rinsing to robot-assisted milling that removes stubborn deposits.

Why all this? Because solids are deposited in every wastewater system - sand, gravel, grease, paper, sometimes even things that should definitely not be there. Depending on the flow velocity, gradient and usage, these particles settle, narrow the cross-section and, in the worst case, can completely block the flow.

The most common causes of contamination in the sewer

There are classics - and a few surprises.
The usual suspects include:

• Grease and oil residues from kitchens, especially in restaurants
• Sand and gravel from road drains or construction sites
• Leaves and plant debris after heavy rainfall
• Foreign bodydisposed of via toilets or drains
• Structural defects such as sagging pipe sections or incorrect gradients
• Root ingrowth - Yes, plants also find their way into the pipe

The problem: even if a sewer has been thoroughly cleaned once, these processes immediately start all over again. This is why sewer cleaning is not a one-off project, but a recurring part of maintenance.

Sewer cleaning methods - from gushing to high-tech nozzles

There is not the one Method that always works.
We select the process depending on the situation, pipe size and degree of soiling. Three examples:

1. High-pressure flushing
   Water is sprayed onto the pipe wall at high pressure via a special nozzle. Deposits are loosened and flushed out in the direction of flow.
   Advantage: Very effective, even with longer cables.
   Disadvantage: High water consumption, but this can be significantly reduced by recycling water.
   
   
2. Mechanical cleaning
   Use of milling cutters, chain blowers or propeller nozzles. Ideal when limescale, concrete residue or ingrown roots need to be removed.
   Disadvantage: Higher risk of damage, therefore only for professionals.

When is cleaning really necessary?

Sometimes you can see it straight away: backflow in the toilet, gurgling drains, unpleasant odors. In other cases, the need for action remains invisible until a routine inspection reveals the problem.
Channel heroes therefore often Sewer TV inspections to document the condition - not because we love technology (which is true), but simply because it is the best basis for avoiding unnecessary work.

A practical experience: In areas with a lot of leaves, sand or grease deposits, even one year without cleaning can lead to significant problems. In other areas, flushing every few years is sufficient. There is no general formula, but there are empirical values and measurement data, and we use these.

The difference between a house connection and a large sewer

House connections - the pipes that connect a building to the public grid - are usually smaller, more difficult to access and often the first place to get stuck.
Large sewers, on the other hand, can be walked or driven over and require different equipment. Safety also plays a greater role here, as work takes place in confined and potentially dangerous conditions.

The sewer heroes serve both worlds, from the compact spiral for the kitchen drain to the fully equipped flushing and suction vehicle for the main collector.

Preventive maintenance & sewer management

Cleaning when it is already too late costs time, money and often nerves.
We see sewer cleaning as part of a preventive maintenance concept. A sewer network is alive - sediments form, fats accumulate, pipe material ages.

So that we can act in a targeted manner, we rely on:

• Regular inspections with cameras to detect damage or deposits at an early stage.
• Risk-based prioritizationto clean sections with high loads more frequently.
• Complete documentation of all measures to optimize the intervals.

Channel management - with a plan instead of by chance

A sewer network is like a living organism. Some areas are constantly in motion, others are almost dormant.
We don't create flushing plans based on gut feeling, but on measurement data, video inspections and empirical values.

• Hydraulic analysisWhere does material settle? Where is the gradient too low?
• PrioritizationNot every section needs the same attention.
• OptimizationTargeted rinsing reduces operating times and water consumption.

Digital tools help us to do this. Sensors measure sediment levels, flow rates and sometimes even gas values. The data flows into a central database - and precise deployment plans are created from this.

Special applications - when standard is not enough

Not every sewer can be cleaned with high pressure alone.
In industrial companies, we often work under stricter hygiene requirements or with media that require special materials.

Special situations are for example:

• Emergency operations after heavy rainfall or flooding, where suction, flushing and inspection work must be combined in a short time.
• Structural problems such as sagging pipes or tight radii that require special nozzles.
• Extreme soiling by concrete, lime or root ingrowth, where mechanical equipment such as chain extractors or milling heads are required.

And then there are operations that are challenging simply because of the conditions - such as cleaning under a busy intersection with a narrow time window and complete traffic safety.

Environment and resource conservation

Sewer cleaning needs water. Lots of water. With a high-pressure pump with 150 liters per minute, a water tank is empty faster than you think.
That is why, wherever possible, we rely on Water recycling.

The principle: the waste water that is sucked in is filtered - solids remain in the tank and the purified water flows back into the flushing circuit. This not only saves fresh water, but also time because we don't have to constantly refill the tank.

Security - an underestimated topic

Working in sewers is no walk in the park. Confined spaces, slippery surfaces, possible gas formation - this requires experience and strict safety rules.
Our teams are trained, wear suitable protective equipment and measure the atmosphere before they even enter the vehicle.

Because even though we call ourselves "canal heroes", we know that real heroes do one thing above all: come home safe and sound.

Conclusion - clean channels, clear thing

In the end, it's always about the same thing: water must flow unhindered.
Whether in a private house connection or in the municipal main sewer - every pipe is only as reliable as its maintenance.

The Canal heroes do not see this as a chore, but a task with foresight. Regular cleaning extends the service life of pipes, prevents costly emergencies and protects the environment.
And yes, sometimes that means hard work in narrow shafts, with technology that weighs more than you do - but that's precisely our mission: to solve problems before they become disasters.

You may not often think about it in everyday life. But anyone who has ever stood ankle-deep in basement water knows that prevention is priceless.
And that is exactly what we are here for - day after day, channel after channel.