The Wilkins 1-350XL is a double check valve assembly designed for potable water systems to prevent backsiphonage and backpressure of polluted water into the water supply.

Key Specifications:

• Size: 1 Inches
• Maximum Working Pressure: 175 PSI
• Maximum Working Temperature: 180°F
• Notable Certifications: ASSE 1015, NSF/ANSI/CAN 61 & 372
• End Connections: Threaded ANSI B1.20.1

Other Related Variants:

• 34-350XL: 3/4 Inches version
• 114-350XL: 1 1/4 Inches version
• 112-350XL: 1 1/2 Inches version
• 2-350XL: 2 Inches version

Materials:

• Low Lead Cast Bronze 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. Suitable for both indoor and outdoor installation.

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 & 372

Features & Benefits:

• Backflow Prevention: Protects potable water systems against both backsiphonage and backpressure in non-health hazard applications.
• Lead-Free Compliance: Certified to NSF/ANSI/CAN 61 and 372 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.
• Easy Maintenance: First and second checks are accessible for maintenance without removing the Zurn 1-350XL device from the line, and includes full port ball valves for convenient operation.

FAQ

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

A: The hydrostatic test pressure rating is 350 PSI, ensuring robust performance and reliability in potable water systems.

Q: Can this double check valve assembly be installed vertically?

A: Yes, the assembly is certified for both horizontal and vertical installation according to ASSE 1015 standards.

Q: What accessories are available for the Model 350XL?

A: Available accessories include repair kits, thermal expansion tank (Model XT), QT-SET Quick Test Fitting Set, and winterizing blow out/flush fittings.

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