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The Wilkins 1-720AU is a 1 Inch pressure vacuum breaker assembly designed for irrigation systems, providing reliable backflow protection with integrated union ball valves for simplified installation and maintenance.

Key Specifications:

• Size: 1 Inches
• Maximum Working Water Pressure: 150 PSI
• Maximum Working Water Temperature: 110°F
• Notable Certifications: ASSE 1020, CSA, IAPMO
• End Connections: threaded ANSI B1.20.1

Other Related Variants:

• None Available

Materials:

• Main Valve Body: Cast Bronze ASTM B584
• Bonnet: Bronze
• Fasteners: Stainless Steel, 300 Series
• Elastomers: Silicone and Buna Nitrile
• Polymers: Polypropylene and POM Acetal (Delrin®)
• Springs: Stainless Steel, 300 Series

Typical Installation:

Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted at a minimum of 12 Inches 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 vent could cause damage.

Standards Compliance:

ASSE Listed 1020; UPC Listed; CSA Certified B64.1.2; Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California

Features & Benefits:

• Union Ball Valves Included: Factory-installed union ball valves provide simplified installation and servicing without removing the device from the line.
• Durable Bronze Construction: Cast bronze body and bonnet ensure long-lasting performance in demanding irrigation applications.
• Comprehensive Backflow Protection: ASSE 1020 certified design protects potable water supply from backsiphonage contamination in irrigation systems.
• Accessible Maintenance Design: The Zurn 1-720AU assembly is fully accessible for maintenance and testing without line removal, reducing downtime and service costs.

FAQ

Q: What is the minimum installation height required for the Wilkins 1-720AU?

A: The Zurn 1-720AU must be installed at a minimum of 12 Inches above the highest piping or outlet downstream of the device to ensure proper operation and protection.

Q: Can this pressure vacuum breaker be used for potable water applications?

A: No, the 1-720AU is designed for non-potable applications only, specifically for irrigation water lines to protect against backsiphonage into the potable water supply.

Q: What is the advantage of the U option with union ball valves?

A: The U option includes factory-installed union ball valves that simplify installation and allow for maintenance and testing without removing the assembly from the line, saving time and labor costs.

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