What are duckbill valves and how do they limit flooding in West Palm? Tony Doris. [email protected]. As those who live along South Flagler Drive know too well, rising sea levels are no mere concept.

“The duckbill check valves previously installed by the City and County of Honolulu in Mapunapuna are still in place and functioning as designed.

A new ultraminiature duckbill check valve is designed to withstand up to 250-psig backpressure. The CKV-M3 valve is commonly used for gas and pneumatic applications, and is said to be useful for ...

The town in 2009 installed "duckbill" valves on the end of pipes outside bulkheads on four low-lying streets in an attempt to halt the flooding. However, ...