The Wilkins 112-350XL is a double check valve assembly designed to protect potable water systems from backsiphonage and backpressure in non-health hazard applications.

Key Specifications:

• Size: 1 1/2 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
• 1-350XL: 1 Inches version
• 114-350XL: 1 1/4 Inches version
• 2-350XL: 2 Inches version

Materials:

• Reinforced Nylon Housing
• Low Lead Cast Bronze Main Valve Body (ASTM B 584)
• Stainless Steel Fasteners (300 Series)
• Stainless Steel Springs (300 Series)
• Silicone Elastomers (FDA Approved)
• Buna Nitrile Elastomers (FDA Approved)
• Delrin Internals
• 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 protection against both backsiphonage and backpressure of polluted water into potable water supply systems.
• Lead-Free Construction: Meets NSF/ANSI/CAN 372 requirements with less than 0.25% weighted average lead content for safe drinking water applications.
• Easy Maintenance: First and second checks are accessible for maintenance without removing the device from the line, reducing downtime and installation costs.
• Durable Materials: Reinforced nylon housing with stainless steel internals ensures long-lasting performance in indoor or outdoor installations.

FAQ

Q: Can the Zurn 112-350XL be installed vertically or horizontally?

A: Yes, the Zurn 112-350XL is compliant for both horizontal and vertical installation as certified by ASSE 1015 and CSA B64.5 standards.

Q: What is the hydrostatic test pressure rating for this valve?

A: The Model 112-350XL has a hydrostatic test pressure rating of 350 PSI, providing reliable performance under high-pressure conditions.

Q: Does this double check valve come with shut-off valves?

A: Yes, the standard configuration includes full port QT ball valves. Options without ball valves are available for 3/4 Inches and 1 Inches sizes by specifying the "L" suffix.

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