Designed for installation on potable water lines to protect against back siphonage of contaminated water into the potable water supply. Assembly shall provide protection where a potential health hazard exists.
Tapped ball valves with threaded test cocks allow installation in either position allowing direct replacement of other manufacturer's PVB, regardless of orientation
Bronze Bonnet for greater strength and durability
Serial Number visible in any installed orientation
Top access for easy maintainability
Protects against back siphonage
Typical application: irrigation system
The owner must protect from freeze damage
Maximum working water pressure: 150 PSI
Maximum working water temperature: 110F
Hydrostatic test pressure: 300 PSI
End connections threaded: ANSI B1.20.1
The Pressure Vacuum Breaker shall be ASSE 1020 approved, and supplied with full port ball valves. The main body and bonnet shall be bronze (ASTM B584), the loaded-air inlet shall use a silicone elastomer spring and seat disc. The entire assembly shall be accessible for maintenance and testing without removing the device from the line. The Pressure Vacuum Breaker shall be a WILKINS Model 720A.
Main valve body: Cast Bronze ASTM B584
Fasteners: Stainless Steel, 300 Series
Elastomers: Silicone (FDA approved); Buna Nitrile (FDA approved)
Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California
Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted at a minimum of 12" (305mm) above the highest piping or outlet downstream of the device.
Install with adequate drain and sufficient side clearance for testing and maintenance. The installation shall be made so that no part of the unit can be submerged. A pressure vacuum breaker cannot be installed where back-pressure could occur or where spillage of water from the vent could cause damage.