Zurn - 1" Vacuum Breaker With Union Ball Valve

The Zurn Wilkins 720A Pressure Vacuum Breaker is designed to safeguard non-potable irrigation systems from backsiphonage, protecting water supplies where health hazards may exist. With its all-bronze construction, corrosion-resistant internal parts, and reliable check and air inlet valves, it offers consistent performance in demanding commercial and residential environments. Available in sizes from 1/2" to 2", it supports high flow rates and includes full port resilient seated shut-off valves and test cocks for easy maintenance and compliance testing.

Key Features:

• Provides protection from backsiphonage in non-potable irrigation systems
• Includes integral check valve, vacuum relief, test cocks, and full port shut-off valves
• Meets ASSE® 1020, CSA B64.1.2, and UPC® standards
• Approved by the USC Foundation for Cross-Connection Control
• All bronze body and bonnet for superior durability
• Test cocks positioned for installation flexibility
• Rated to 150 PSI working pressure and 110°F max temperature

Construction & Durability:

• Main body cast from ASTM B584 bronze for strength and weather resistance
• Corrosion-resistant stainless steel springs and fasteners
• Resilient Buna N and silicone elastomers for sealing integrity
• Internal polymers include Delrin® and polypropylene for wear resistance
• Withstands light freezing with proper installation and drainage

Performance & Functionality:

• Max working pressure: 150 PSI
• Hydrostatic test pressure: 300 PSI
• Temperature range: 33°F to 110°F
• Flow performance supports high-volume irrigation systems
• Integrated air inlet and check valve ensure reliable shut-off and pressure relief

Ease of Installation & Use:

• Vertical installation with clear labeling for inlet and outlet connections
• Minimum 12" installation height above highest downstream piping
• Accessible test cocks simplify compliance testing and maintenance
• Drainage and winterization steps outlined for seasonal protection
• Canopy design allows tool-free access for internal inspection and repair

Technical Specifications:

• Operating Pressure Range: Up to 150 PSI
• Flow Rate: Varies by size (refer to flow chart in specification sheet)
• Temperature Range: 33°F to 110°F
• Available Sizes/Models: 1/2", 3/4", 1", 1 1/4", 1 1/2", 2"
• Thread Type: ANSI B1.20.1 (female threaded)
• Pressure Regulation: None (vacuum breaker function only)
• Body Diameter: Varies by size (see dimensional chart)
• UV-Resistance: Bronze body suitable for outdoor installs
• Pop-Up Height: N/A
• Electrical Inputs/Outputs: None

Installation & Application:

• Recommended Uses: Commercial and residential non-potable irrigation systems
• Mounting: Vertical only, with test cocks accessible for testing
• Climate Compatibility: Outdoor use with freeze protection or seasonal drainage
• Drainage: Leave valves and test cocks in 45° open position during winter

Compatibility & Optional Accessories:

• Repair Kits: RK1-720A (1/2"–1"), RK1-720AP, RK1-720AB
• QT-SET Quick Test Fitting Set for simplified testing
• Model 1260XL Water Hammer Arrester (optional)