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LF909 Large

Lead Free* Reduced Pressure Valve Assembly Backflow Preventers - Large Diameter 2-1/2 - 10 Inch Sizes

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

Select a Model

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

Approval/Certification Information

For product-specific approval information, please refer to the product’s specification sheet or ask a Watts representative. For general information regarding any approval certification partners identified in the specification sheet, please visit our certification partners’ websites:


ASSE CSA FM Approvals NSF
UL ULC USC WQA