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Febco Pressure Vaccuum Breaker Assemblies

The Febco 765 Series Pressure Vacuum Breakers are designed to be installed to provide protection against back siphonage of toxic or non-toxic liquids.
They feature a durable bronze body and a check valve and air opening port in one assembly. Maximum Working Pressure: 150psi (10.3 bar).
  • All bronze body for durability
  • One check valve and an air opening port in one assembly.
  • Lightweight poppet seals air opening under minimum flow conditions.
  • Simple service procedures. All internal parts are serviceable in line from the top of the unit.
  • Designed for minimum head loss.
  • Engineered plastic bonnet protect valve bodies from freeze damage.
  • Optional union end ball valves for easy removal and ultimate freeze protection.
  • End Connections – NPT ANSI/ASME B1.20.1


Pressure Vacuum Breaker assemblies shall be installed to withstand pressure for long periods and to prevent backflow of contaminated water into the potable water system in back siphonage conditions. The Pressure Vacuum Breaker assembly shall consist of a single spring loaded check valve which closes tightly when water flows through the assembly drops to zero, and a single air relief valve that opens to break the siphon when pressure drops to 1psi. The assembly shall include two resilient seated shut-offs and two resilient seated test cocks, considered integral to the assembly. Assemblies must be factory backflow tested. The check valve and air inlet valve must be constructed to allow in-line servicing of the assembly. The valve body shall be constructed of bronze. The check, poppet and bonnet assembly shall be constructed of engineered plastic to protect the valve body from freeze damage.

Pressure Vacuum Breaker assemblies shall be installed a minimum of12" (300mm) above the highest downstream outlet and the highest point in the downstream piping. The assembly shall be rated to 150psi working pressure and water temperature from 32°F to 140°F. The assembly shall meet the specificationsof the USC FCCC & HR Manual.

Pressure Vacuum Breaker assemblies shall be FEBCO Series 765 or prior approved equal.

  • Main Valve Body: Bronze
  • Elastomers: Nitrile

Pressure – Temperature
  • Max. Working Pressure: 150psi (10.3 bar)
  • Hydrostatic Test Press: 300psi (20.7 bar)
  • Temperature Range: 32°F to 140°F (0°C to 60°C)

  • Union End Ball Valves
  • Bronze Bonnet, 11⁄2" & 2" (40 & 50mm)

Approvals – Standards
  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California