When must a double-lift system be used?
In cases where the inflow to the lifting station must not be interrupted during normal operation, the lifting station must be equipped with a second pumping device (dual pumping system) of equal capacity, which switches on automatically if necessary.
This is the case, for example, with a lifting station that discharges rainwater. The operation of this station must be guaranteed at all times. If, for example, a pump fails during a rainy day, the rainwater cannot continue to be discharged and may damage parts of the building. In this case, the necessity of the second pump becomes clear, as it can now take over the entire operation. The lifting station now sends a signal indicating the failure of the first pump. However, there is sufficient time to react, as the backup pumping unit (the second pump) maintains operation.
The same applies, for example, when lifting stations are used to drain waste water from self-contained residential units or commercial premises, such as after a grease separator. In such cases, a dual lifting station must always be installed.
In the event of an uncontrolled inflow
for lifting stations, e.g. in high-rise or multi-storey buildings or underground car parks
RSE = backwater level, W = flat
In commercial premises
such as hotels and restaurants
RSE = backwater level
Behind the separator units
for grease or light liquids
RSE = backwater level
