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Lesd Free* MasterSeries In-Line Double Check Detector Assemblies (Type II) - Large Diameter

MasterSeries LF856 Lead Free* double check detector assemblies are designed to protect drinking water supplies from dangerous cross-connections in accordance with national plumbing codes and water authority requirements for non-health hazard service applications such as irrigation, fire line, or industrial processing. They feature a ductile iron body. Maximum working pressure: 175psi (12.1 bar).


  • 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

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

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: