Flap Valves (Outfall Gates)

Automated Backflow Prevention for Critical Water Infrastructure

Fibros Flap Valves are precision-engineered, gravity-operated non-return valves explicitly designed for liquid media and aquatic environments. Installed at the terminus of discharge pipes, culverts, and marine outfalls, these valves provide a fail-safe barrier against reverse flow. They freely open under the forward pressure of discharging effluent and automatically swing shut against rising tailwater, tidal fluctuations, or flood surges. Engineered for maximum reliability with zero external power requirements, our flap valves deliver critical isolation for municipal sewage, stormwater networks, and industrial wastewater outfalls.