Have a lifting system installed?

Hi,

J

Does the lifting station have anything to do with it, or do you only need the backflow flap and the lifting station is just to pump the water below the sewer level into the sewer?

The backflow flap can theoretically be enough, but only if it is not stuck...

A lifting station has two functions:

[*]Raising the wastewater to a level where it can flow into the sewer by itself at all. For example, if the sewer bottom is at a higher level than your sink in the basement.

[*]Raising the wastewater to a level above the backwater level. From there, it flows into the sewer by itself. This has the advantage that if the sewer overflows, no water can flow into the basement because it would have to rise higher inside the house than is actually possible (backwater level).

In case 1 you definitely need a lifting station. In case 2, a backflow flap is enough for normal operation. But if it fails in case of flooding, your basement will flood via your sink.

Best regards,

Andreas