Location: Hirschthal, Switzerland
Problem: During times of high river levels, flooding occurred in the town of Hirschthal. This flooding occurred when the river level was higher than the stormwater outfall. This lead to river water pushing back up the outfall pipe, and spilling onto roads and residential areas.
Solution: A DN1200 (NPS 48″) WaStop inline check valve was installed inside the stormwater outfall to allow stormwater to flow into the river but to prevent any backflow from flowing back up the stormwater outfall during high river levels. This gave the townsfolk peace of mind knowing that the town would not suffer from flooding cause by backflow.
Design: DN1200 Stainless Steel insert WaStop