WARNING! 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.
- 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.
- 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 in stalled 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 Series 765 or prior
approved equal.
- Main Valve Body: Bronze
- Elastomers: Nitrile
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