The Effertz Hydrowall flood protection door is quickly closed and securely sealed. It has been tested according to a strict procedure by the European Flood Protection Association. It goes without saying that it meets all safety requirements for industrial doors. With its classification in the best possible tightness level 1, it offers the officially confirmed lowest leakage rate. In our tests, we significantly undercut it with a value of 0.01 l/min/m².