Cases: MwStop® Bypass
Case study: MwStop® Bypass – Safe drainage of a residential development during heavy rainfall and backwater events.
Protection against backflow and flooding – featuring gravity flow during normal operation and automatic pump assistance when needed.
The Challenge
Runoff from a newly built residential development is discharged into a nearby stream.
During heavy rainfall, the stormwater from the development cannot always be drained away sufficiently.
The result: backflow in the drainage system and a risk of flooding for the residential area.
The Solution
The MwStop® Bypass is a hybrid bypass chamber that combines a backflow preventer and a pumping station into a single, energy-efficient solution.
In the event of backflow, the MwStop® closes automatically, preventing water from flowing back. Simultaneously, the pumps activate to divert the accumulating water past the closed backflow preventer.
The Key Advantage
Unimpeded gravity flow is always possible – with pumping only required when necessary. During normal operation, drainage occurs via gravity (without the need for additional pumping energy). Reliable drainage and energy-efficient operation combined in one system.







