Dual-Action™ Check module

The Patent Pending Dual-Action Check™ module is the core technology behind the superior performance of the Deringer Backflow Prevention Product Line. The Dual-Action Check™ combines all of the best features of industry standard “poppet” checks and “swing” checks creating a single high performance Dual-Action™ Check module. Features Light weight engineered polymer components Modular for quick and easy servicing Disconnect spring tension for safe servicing Replaceable Silicone Rubber Elastomer Disk Excellent resistance to fouling