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Lead-free* Anti-Siphon Pressure Vacuum Breakers Sizes: 1/2″ - 2″ (15 – 50mm)

Series LF800M4QT Lead-free* Anti-Siphon Pressure Vacuum Breakers prevent the reverse flow of liquids in a plumbing system due to backsiphonage where there is a potential health hazard. For use in continuous pressure applications where the water enters the equipment at or below its flood rim. Designed for ease of maintenance with a replaceable plastic seat and readily accessible test cocks for testing and winterization. The seat disc is silicone rubber for durability, and an O-ring bonnet seal resists fouling.


  • Test costs are positioned for easy testing and winterization
  • Health hazard protection level
  • Replaceable plastic seat
  • Acetal bonnet acts as freeze plug to prevent body damage

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Select options below to identify the UPC, Order Code, and Repair Kit for a specific LF800M4QT

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: