DUCKBILL VALVE
Rubber Duckbill
The rubber duckbill check valve is an elastomeric one-way rubber valve designed as a duckbill backflow preventer for outfall and discharge systems. Under forward pressure, the duckbill opens to allow flow. When flow stops or reverse pressure occurs, it closes automatically to prevent backflow. With no moving mechanical parts, hinges, or springs, it offers reliable, low maintenance performance for wastewater, CSO, stormwater, and discharge applications.
Size Range
DN150 - DN1200
Material
EPDM (NBR optional)
Opening Pressure
Very Low (gravity flow)
Back Pressure
Up to 5m head
Maintenance
Zero - No moving parts
Installation
Flanged / Slip-on
APPLICATIONS
Key Applications for Our Duckbill Check Valves
Sewage Outfalls
Wastewater discharge and combined sewer overflow (CSO) points
Stormwater
Stormwater outfalls, drainage systems, and flood control
Marine
Coastal discharge, tidal protection, and shoreline backflow prevention
Industrial
Process discharge, effluent treatment, and industrial outfall systems
Technical Catalogues
Download detailed specifications, dimensions, and technical data sheets.
Rubber Duckbill Check Valve
Full Product Catalogue
Need a Custom Configuration?
Our engineering team can help you select the right duckbill valve for your discharge application, including flanged and clamped duckbill check valves and rubber non-return valves.
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