Shallow channels of local drainage system, as well as end pipes in new residential area, often form deposits that disrupt the normal flow processes and cause odor problems as well as blockages.

This happens not only in the large-profile channels / pipe storages / storage channels, which have gained more and more acceptance of automatically flushing systems, in recent years, but also increasingly in the pipes of nominal sizes 200 … DN 500, i.e., in the „normal local sewer network.“ Ultimately, these blockages can also damage the pipes or lead to the failure of the sewer system (i.e. discharge of wastewater through the backwash line).”

Conventional cleaning is often done by truck cleaning, which is associated with high mechanical and personnel costs.


With the described below channel cleaner, rainwater and mixing water will be dammed in a channel cleaning chamber (shaft) up to a certain water level.

The Biogest “channel cleaner” works automatically with the rise and fall of the water level in the shaft. When the water reaches the desired level the outlet automatically opens all of a sudden and the contents of the chamber are
forced under gravity into the sewer. The water swirl cleans the floor of sludge and other sewage related debris and fed to the subsequent drainage.

Once the flushing chamber is fully drained, the drain outlet hole is closed and water for renewed flushing can de dammed up once more. The supply of the flushing water is usually given through a pipe connection provides a road inlet or a rain water house connection. The flushing water volume needed depends on the appropriate requirements, but can be also changed under particular circumstances.

The channel-cleaner has a robust construction and very low maintenance expenditures. It works without electrical power. It cannot be excluded that damages (fine cracks) occurs during this process. Thus, the cleaning effect is of only short duration and deposits build up relatively quickly, which then needs to be flushed again.

Function / schematic description

While the chamber is empty the outlet opening is closed by the float on top of it. As the water level begins to rise the float remains in closed position until the water level reaches the overflow pipe. Then the main float in connection with the shaft and the sealing element are lifted up. With the outlet open, the stored water surges from the chamber into the sewer. The water level in the chamber falls allowing the main float also to fall. Once the outlet is closed again the following water stream in the chamber rises to the desired level again. The flushing cycle can then repeated.

Possible applications

Case A 1:

Small sewer systems with flat channel slope. In the first shaft with drainage profile (including the necessary recesses), a BIOGEST-Channel leaner will be installed. A lateral or sink box connection or rain water house connection is
used for automatically filling of the channel cleaner chamber. The installation of the Channel cleaner can be realized in the factory of the shaft manufacturer (in the shaft base).

Case A 2:

As in the case A 1, merely in a blank shaft (i.e. without drainage profile), a 90° – pipe elbow is mounted to the outlet opening. The channel cleaner is arranged on the horizontal connection.

Case B:

New equipment or retrofitting of a channel cleaner by producing an intermediate flushing shaft.

Case C:

Using a BIOGEST-Channel cleaner at the end of flushing sump. Upgrading an insufficient cleaning of the flushing sump.

Advantages of the BIOGEST– Channel cleaner Type KSP at a glance

  • reduces the operating costs of water management company / operators
  • continues channel flushing DN 200 … DN 500
  • automatically flushing without electrical power in shallow channels systems
  • prevents odor problems in flat channels and end pipe connection noiseless
  • long flushing wave
  • robust construction in stainless steel
  • adaption of flushing volume possible
  • minimal maintenance
  • planning support + construction support by the manufacturer

All the above components are in 1.4301 (optional: 1.4571) and disassembled into individual parts (for installation option for small installation openings).