LF909 Large

Lead Free* Reduced Pressure Zone Assembly Backflow Preventers with Flood Sensor - Large Diameter 2-1/2 - 10 IN Sizes

  • Sensor on the relief valve for flood detection
  • Flood alert feature activated with add-on connection kit, compatible with BMS and cellular communication
  • Cast iron body construction with patented 3-part ArmorTek® epoxy coating for advanced corrosion resistance
  • Exclusive relief valve design provides maximum capacity during emergency conditions
  • Industrial strength sensing hose on larger size models
  • Can be used in a variety of installations, including containment at the service line entrance
  • No special tools required for servicing

Approval/Certification Information

For product-specific approval information, please refer to the product’s specification sheet (see literature section above) 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