Duckbill valves are unique, one-piece, elastomeric components that act as backflow prevention devices or one-way valves or check valves. The design and structure of duckbill check valves make them widely applicable in pressured fluid environments. The elastomer bill design is low-maintenance, rust-free, and can be highly responsive to very subtle pressure changes across line fluid. The main advantage of duckbill valves over other types of one-way valves is that duckbill valves are self contained as opposed to valves where a sealing element has to engage with a smooth seat surface to form a seal.

Elder Rubber Duckbill Check Valves are available in various elastomeric material, including medical and food-grade silicone and hydrocarbon-resistant fluorosilicone rubber to handle a broad range of media and temperatures.