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LF856

Lead Free* MasterSeries In-Line Double Check Detector Assembly Backflow Preventers (Type II) - Large Diameter

  • Utilizes advanced ArmorTek coating technology to resist corrosion of internals
  • The valve body shall utilize a coating system with built in electrochemical corrosion inhibitor and microbial inhibitor
  • Primarily used for protection of drinking water systems and fire sprinkler systems
  • Winterization feature with disc retainers and valve body drain ports
  • Protects drinking water supplies from dangerous cross-connections
  • Inline serviceable assembly requires no special tools

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific LF856

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