List of featured suppliers of FLAP VALVES Surface Water Drainage on Building Products Index
Flap valves, surface water drainage are mechanisms that allow water to flow out of a drainage system while preventing water or debris from flowing back in. They are typically positioned on the downstream end of the drainage pipe, allowing water to be discharged while blocking entry of backflow, such as storm water or sewage, especially during high water events. They typically feature a hinged flap that opens in the direction of flow, and is designed to close tightly when the flow direction reverses or when there is no flow. Flap valves are essential components in efficient drainage systems for roadways, buildings, and other infrastructure.
