JML Wall Flap Valves are an end-of line flanged Check Valve designed specifically to stop media flowing into pipes and channels that discharge into lakes, rivers and the ocean.

Available in a range of materials to suit both corrosive and chemical applications, and in round or rectangular configurations, our Wall Flap Valves feature double hinges allowing for self alignment of the flap and a tapered seat to ensure positive shut off even when water movement caused by tidal or swell action causes sudden changes in back pressure.