The Wilkins 1-350 is a double check valve assembly designed for backflow prevention in low to moderate hazard applications, providing reliable protection against both backsiphonage and backpressure.

Key Specifications:

• Size: 1 Inches
• Maximum Working Water Pressure: 175 PSI
• Maximum Working Water Temperature: 180°F
• Notable Certifications: ASSE 1015, CSA B64.5, AWWA C510
• End Connections: Threaded ANSI B1.20.1

Other Related Variants:

• 112-350: 1 1/2 Inches model size
• 114-350: 1 1/4 Inches model size
• 2-350: 2 Inches model size
• 34-350: 3/4 Inches model size

Materials:

• Cast Bronze main valve body (3/4" - 1"), ASTM B 584
• Reinforced Nylon housing
• Stainless Steel fasteners, 300 Series
• Silicone elastomers (FDA Approved)
• Buna Nitrile elastomers (FDA Approved)
• Delrin internals, NSF Listed
• Stainless Steel springs, 300 Series
• Cast Bronze ball valves, ASTM B 584
• Stainless Steel struts, 300 Series
• Stainless Steel handles, 300 Series

Typical Installation:

Local codes shall govern installation requirements. To be installed in accordance with the manufacturers' instructions and the latest edition of the Uniform Plumbing Code. Unless otherwise specified, the assembly shall be mounted at a minimum of 12 inches (305mm) and a maximum of 30 inches (762mm) above adequate drains with sufficient side clearance for testing and maintenance. If installed below grade, be certain adequate drainage is provided to prevent the device from being submerged.

Standards Compliance:

ASSE Listed 1015; cUPC Listed; CSA Certified B64.5; AWWA Compliant C510; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California; UL Classified (less shut-off valves only); C-UL Classified (less shut-off valves only)

Features & Benefits:

• Dual Protection: Protects against both backsiphonage and backpressure of polluted water into the water supply.
• Serviceable Design: First and second checks are accessible for maintenance without removing the Zurn 1-350 device from the line.
• Durable Construction: Built with cast bronze and reinforced nylon components, stainless steel fasteners, and FDA-approved elastomers for long-lasting performance.
• Versatile Configuration: Available with optional full port QT ball valves, integral test fittings, lead-free strainer, and blow out/flush fitting options.

FAQ

Q: What applications is the Wilkins 1-350 suitable for?

A: The Wilkins 1-350 is designed for installation on water lines where a potential health hazard does not exist, providing protection in low to moderate hazard applications.

Q: What is the hydrostatic test pressure rating for the Zurn 1-350?

A: The hydrostatic test pressure rating is 350 PSI, while the maximum working water pressure is 175 PSI.

Q: Can this device be installed vertically?

A: Yes, the assembly is approved for both horizontal and vertical installation and complies with ASSE 1015 standards in both orientations.

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