DWA Industry Guide Watermanagement, Wastewater-Waste

3.2.3 Small sewage treatment plants with wastewater aeration (DIN 4261)

3.3.3 stormwater utilisation systems

3.3.5 stormwater infiltration

4.3.1 Petrol separators

4.3.2 Grease traps

5.1.1 Wastewater lifting installations