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Febco 765 PVB Backflow Preventer 3/4 in. FPT | FE765-075

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Febco 765 PVB Backflow Preventer 3/4" FPT

  • Febco 765 Backflow Preventer
  • Female Pipe Thread
  • 3/4 inch Pressure Vacuum Breaker

Features & Benefits

FEBCO Series 765 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.

  • 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 serviceable in line from the top of the unit.
  • Designed for minimum head loss.
  • Engineered plastic bonnet protect valve bodies from freeze damage.
  • End Connections - NPT ANSI/ASME B1.20.1
  • Maximum Working Pressure: 150psi.

Product Details

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 backsiphonage conditions. The Pressure Vacuum Breaker assembly shall consist of a single spring-loaded check valve which closes tightly when water flow 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 of 12" (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 degrees F to 140 degrees F. The assembly shall meet the specifications of the USC - FCCC & HR Manual. Pressure Vacuum Breaker assemblies shall be FEBCO ½ Series 765 or prior approved equal.


  • Main Valve Body: Bronze
  • Elastomers: Nitrile


Irrigation systems supplied by domestic or private potable water systems are considered to be a potential pollution hazard to the water supply. These systems must include protection to prevent possible backflow of irrigation water into the potable water supply.

Federal law requires a proper backflow device to be installed on any watering system to prevent contamination of the supply; whether it be pump or city water. Check your local water authority for installation requirements & codes. In many rural areas; specific requirements for landscape irrigation systems may not be covered in local plumbing codes and/or enforcement may be limited. HOWEVER...limitation in local authority does not alter the basic requirement for protection of the potable water supply.

3/4 in.
1 Year
Test Cocks:
Stainless Steel
Temperature Range:
32F to 140F
Hydrostatic Test Pressure:
350 PSI
Main Valve Body Materials:
Max Working Pressure:
175 PSI
Lead Free:
Not Lead Free
Handbook (7.38 MB)
Procedure (77.72 kB)
Manual (88.65 kB)
Manual (501.96 kB)
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