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Reduced Pressure Valve Assemblies Sizes: 3/4″- 1″ (8 – 80mm) and 2 1/2″ - 10″ (65 – 250 mm)

Series LF909 prevents the reverse flow of liquids in a plumbing system due to backpressure or backsiphonage where there is a potential health hazard. An exclusive relief valve design provides substantially improved relief valve discharge performance during emergency conditions of combined backsiphonage and backpressure. The seats are replaceable for economical repair. Smaller sizes can be installed vertically or horizontally.


  • Can be used in a variety of installations, including containment at the service line entrance. No special tools required for servicing
  • Exclusive relief valve design provides maximum capacity during emergency conditions
  • Health hazard protection level
  • Industrial strength sensing hose on larger size models

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific LF909

Approval Information

For approval information, please refer to the products specification sheet. For any other information on product certification and documentation information, please visit our certification partner websites: