Pumps are devices that create pressure differences within liquids to move them. In the wastewater sector, there are various sewage pumps, waste water pumps, and fecal pumps with different sizes,capacities, and performance levels that help move waste water in the network towards treatment plants.

Overflow(Streichwehr / Leaping weir): An overflow is a component in relief structures and channels for diverting wastewater in different directions. This means that a maximum amount of water flows to the waste water treatment plant (or another wastewater treatment plant), and any additional amounts of water (e.g., during heavy rain) are diverted over a sill/weir into a receiving water body,i.e., a body of water. A Streichwehr is an overflow in which a weir is constructed parallel to the flow direction. A Leaping weir is an overflow with a bottom opening: normally the water flows there towards the wastewater treatment plant, but with excess water, the remaining water flows straight ahead. (Sources: VSA, internal SEW documents) *Relief structures serve to relieve the wastewater network during rain events by intermediate storage or direct discharge of wastewater into the water body. Prominent examples are storm water overflow basins (Assembly AssetType 202)and storage channels (Line AssetType 220). (Source: Kanal-Netz GmbH)

Shut-off/throttledevice: outflow regulator, control slide, float throttle... The shut-off or throttle device is adevice that reduces the outflow of water. Possible variants are, for example, the throttle valveor a throttle line, i.e. a line with a reduced cross-section. The shut-off or throttle device isusually used together with an overflow. (Source: VSA)

Outfallas a node in the hydraulic network. An outfall is a surface water body into which treated wastewater or surplus water from overflows is discharged with water law permission. There are both natural outfalls, such as lakes or rivers, and artificial outfalls, such as canals or basins.There are also main and secondary outfalls; the latter are a temporary solution when the main outfalls are full (Source: Uhrig Bau, WasserWissen). It is not a physical component, but the transition from the pipeline network to the water body. This asset type can also be used as an end node where responsibility for the network ends and where rainwater flows into another network.

Sewagetreatment plant, wastewater treatment plant (WWTP), small wastewater treatment plant (SWWTP) as anode in the hydraulic network. This asset type is defined as the transfer point from the pipeline network to a sewage treatment plant. It is not a physical component but the entrance to the sewage treatment plant. This asset type can also be used as an end node where responsibility for one network ends and wastewater passes into another network.

Infiltrationfacility as a node in the hydraulic network. This asset type serves as a transfer point from the pipeline network to an infiltration facility. It is not a physical component.