The Wilkins 34-350XL is a double check valve assembly designed to protect potable water systems from backsiphonage and backpressure in non-health hazard applications.

Key Specifications:

• Size: 3/4 Inches
• Maximum Working Water Pressure: 175 PSI
• Maximum Working Water Temperature: 180°F
• Notable Certifications: ASSE 1015, NSF/ANSI/CAN 61 & 372
• End Connections: Threaded ANSI B1.20.1

Other Related Variants:

• 1-350XL: 1 Inch model size
• 114-350XL: 1 1/4 Inches model size
• 112-350XL: 1 1/2 Inches model size
• 2-350XL: 2 Inches model size

Materials:

• Low Lead Cast Bronze main valve body, ASTM B 584
• Reinforced Nylon housing
• Stainless Steel fasteners, 300 Series
• Silicone elastomers, FDA Approved
• Buna Nitrile elastomers, FDA Approved
• Delrin internals
• Stainless Steel springs, 300 series
• Low Lead Cast Bronze ball valves, ASTM B 584
• Stainless Steel struts, 300 Series
• Stainless Steel handles, 200 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 and a maximum of 30 inches 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); NSF/ANSI/CAN 61 and 372

Features & Benefits:

• Backflow Protection: Provides reliable protection against both backsiphonage and backpressure of polluted water into potable water supply systems.
• Lead-Free Compliance: Meets NSF/ANSI/CAN 61 and 372 standards with less than 0.25% weighted average lead content for safe drinking water applications.
• Durable Construction: Features low lead cast bronze body, reinforced nylon housing, and stainless steel internals for long-lasting performance in demanding conditions.
• Easy Maintenance: First and second checks are accessible for maintenance without removing the device from the line, minimizing downtime and installation costs.

FAQ

Q: Can the Zurn 34-350XL be installed vertically or only horizontally?

A: The Zurn 34-350XL is compliant with ASSE 1015, CSA B64.5, and other standards for both horizontal and vertical installation orientations.

Q: What is the hydrostatic test pressure rating for the Wilkins 34-350XL?

A: The Wilkins 34-350XL has a hydrostatic test pressure rating of 350 PSI, exceeding the maximum working pressure of 175 PSI.

Q: Is the 34-350XL suitable for outdoor installation?

A: Yes, the 34-350XL can be installed both indoors and outdoors. For outdoor installations, a protective enclosure is recommended to shield the assembly from environmental elements.

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