The Wilkins 1-720A is a 1-inch pressure vacuum breaker assembly designed to protect potable water systems from backsiphonage in irrigation applications.

Key Specifications:

• Size: 1 Inches
• Maximum Working Water Pressure: 150 PSI
• Maximum Working Water Temperature: 110°F
• Notable Certifications: ASSE 1020, UPC, CSA B64.1.2
• End Connections: Threaded ANSI B1.20.1

Other Related Variants:

• 12-720A: 1/2 Inches model size
• 34-720A: 3/4 Inches model size
• 114-720A: 1 1/4 Inches model size
• 112-720A: 1 1/2 Inches model size
• 2-720A: 2 Inches model size

Materials:

• Cast Bronze ASTM B584 main valve body
• Stainless Steel fasteners (300 Series)
• Silicone elastomers
• Buna Nitrile elastomers
• Polypropylene polymers
• POM Acetal (Delrin) polymers
• Stainless Steel springs (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:

• Backflow Prevention: Protects potable water supply from backsiphonage of contaminated water in irrigation systems where a potential health hazard exists.
• Durable Construction: Cast bronze body to ASTM B584 standards with stainless steel fasteners and springs ensures long-lasting performance and reliability.
• Easy Maintenance: Entire assembly is accessible for maintenance and testing without removing the device from the line, reducing downtime and labor costs.
• Full-Port Ball Valves Included: Supplied with full-port ball shut-off valves for complete installation convenience and optimal flow characteristics.

FAQ

Q: What is the minimum installation height required for the Zurn 1-720A?

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

Q: Can the Wilkins 1-720A be used in applications with back-pressure?

A: No, the Wilkins 1-720A pressure vacuum breaker cannot be installed where back-pressure could occur. It is designed specifically for protection against backsiphonage only in non-potable irrigation applications.

Q: What accessories are compatible with the Model 720A?

A: Compatible accessories include complete repair kits, Model 1260XL Water Hammer Arrester, and QT-SET Quick Test Fitting Set for maintenance and testing purposes.

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