The ACO Powerlift pumping station is ideal for transporting entrained water, and also guarantees 100% backflow protection in the tunnel. Furthermore, with the ACO Powerlift, cost-intensive refurbishment is a thing of the past. The resin-bonded shaft bodywork is resistant to biogenic sulphurous acid in the wastewater. The pump devices, e.g. underwater coupling, ball retaining valve and the pumps themselves are made of durable grey cast iron. The pressure lines and the ball gate valves are made of PVC-U, which has outstanding chemical resistance and is completely resistant to corrosion.