Hydro Gate by Mueller Brand
Function: Hydro Gate Flap gates act as automatic check valves. They open to allow water to discharge through levees, sewer lines, and conduits when there is a small differential pressure from the back of the gate. They then close automatically to prevent backflow when the water level on the face side rises.
Function: Hydro Gate are designed for controlling flow through large waterway openings, roller gates can be operated to open either upward or downward.