Proactive cleaning as per DIN EN 14654-1 serves to mitigate problems before they occur by implementing the following principal objectives:

• Securing a defined status (safe and correct operation) of drains and sewers by eliminating debris, deposits, obstacles, etc.;

• Preventing the appearance of odours and gases caused by putrefaction processes as well as the formation of biogenic sulphuric acid corrosion in structures made of cementitious materials;

• Limiting polluting discharges into receiving water bodies;

• Ensuring that inspection or rehabilitation work remains feasible and practical;

• Preserving the value of the drain and sewer system.