KESSEL AG

Catalogue EN 4.1

23

Slope to the public sewer

Backwater level

Public

sewer

Backwater level

Public

sewer

Slope to the public sewer

Backwater valves and hybrid lifting stations can

be used here.

Function

Protects in the event of backwater

The backwater flap prevents wastewater

from the public sewer from backing up through

the drainage pipe and flooding the building.

No slope to the public sewer

If the public sewer is higher than the basement level,

the wastewater must be lifted to the sewage pipe

with a lifting station via a backwater loop.

Backwater

Backwater

Disposes in the event of backwater

Despite backwater from the public sewer and

closed backwater flap(s), domestic waste-

water can be disposed of via a pump. This

ensures that the building’s drainage system

functions even in the event of backwater.

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