Pressure pipe for primary wastewater system. Pressure pipes are pipes through which wastewater cannot be transported solely by gravity. They are usually built downstream of individual pumps or entire pumping stations and convey the wastewater to a higher-lying sewer. Primary pressure pipes are hydraulically relevant. (Source: LifeWaterCycle by EGGER, internal SEW documents) 

Pressure pipe for secondary wastewater system. Pressure pipes are pipes through which wastewater cannot be transported solely by gravity. They are usually built downstream of pumps and convey wastewater to a higher-lying sewer. Secondary pressure pipes are not hydraulically relevant. They usually include street and property drainage. (Source: LifeWaterCycle by EGGER, internal SEW documents)

Internal pressure line: Pressure lines within the building or area for which the consumer is responsible.