The Wilkins 114-350 is a double check valve assembly designed to prevent backflow caused by backsiphonage or backpressure in potable water systems.

Key Specifications:

• Size: 1 1/4 Inches
• Maximum Working Water Pressure: 175 PSI
• Maximum Working Water Temperature: 180°F
• Notable Certifications: ASSE 1015; CSA B64.5
• End Connections: Threaded ANSI B1.20.1

Other Related Variants:

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

Materials:

• Cast Bronze main valve body (ASTM B 584) for 3/4" and 1" sizes
• 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 Backflow Protection: Protects against both backsiphonage and backpressure of polluted water into potable water supply systems.
• Durable Construction: Features reinforced nylon housing with stainless steel internal components and FDA-approved elastomers for long-lasting performance.
• Easy Maintenance: First and second checks are accessible for maintenance without removing the Zurn 114-350 device from the line.
• Versatile Installation Options: Available with full port QT ball valves, optional lead-free bronze Y-type strainer, and blow-out/flush fittings for flexible application.

FAQ

Q: What is the maximum working pressure and temperature for the Zurn 114-350?

A: The Wilkins 114-350 is rated for a maximum working water pressure of 175 PSI and a maximum working water temperature of 180°F, with a hydrostatic test pressure of 350 PSI.

Q: Can this double check valve assembly be installed in both horizontal and vertical positions?

A: Yes, the Model 350 is certified for both horizontal and vertical installations according to ASSE 1015 and CSA B64.5 standards.

Q: What maintenance options are available for this assembly?

A: Repair kits are available as accessories, and both check valves are accessible for maintenance without removing the device from the line. Additional accessories include thermal expansion tanks, quick test fitting sets, and winterizing blow-out/flush fittings.

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