The Wilkins 34-350XLFT is a lead-free double check valve assembly designed for backflow protection on potable water systems where health hazards do not exist.

Key Specifications:

• Size: 3/4 Inches
• Maximum Working Pressure: 175 PSI
• Maximum Working Temperature: 180°F
• Notable Certifications: ASSE 1015, cUPC, CSA B64.5
• End Connections: FNPT Threaded

Other Related Variants:

• 112-350XLFT: 1 1/2 Inches size
• 1-350XLFT: 1 Inches size
• 2-350XLFT: 2 Inches size

Materials:

• Low Lead Cast Bronze main valve body (ASTM B 584)
• Reinforced Nylon housing
• Delrin internals
• Stainless Steel springs (300 series)
• Stainless Steel fasteners (300 series)
• Silicone elastomers (FDA Approved)
• Buna Nitrile elastomers (FDA Approved)
• Low Lead Cast Bronze ball valves (ASTM B 584)
• Stainless Steel struts (300 series)
• Stainless Steel handles (200 series)

Typical Installation:

Designed for installation on potable water lines to protect against both backsiphonage and backpressure of polluted water into the water supply. 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, adequate drainage must be provided to prevent the device from being submerged. Installation must comply with local codes and the latest edition of the Uniform Plumbing Code.

Standards Compliance:

ASSE 1015; cUPC; CSA B64.5; AWWA C510; NSF/ANSI/CAN 61 & 372; UL Classified (less shut-off valves only); C-UL Classified (less shut-off valves only); Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California

Features & Benefits:

• Lead-Free Compliance: Meets NSF/ANSI/CAN 61 and 372 standards with less than 0.25% weighted average lead content for safe potable water use.
• Dual Backflow Protection: Protects against both backsiphonage and backpressure to ensure water supply safety in non-health hazard applications.
• Integral Test Fitting: The Zurn 34-350XLFT features a male 45° flare SAE test fitting for simplified testing and maintenance procedures.
• Durable Construction: Reinforced nylon housing with stainless steel components and FDA-approved elastomers ensures long-lasting performance and reliability.

FAQ

Q: What is the difference between the Wilkins 34-350XLFT and standard 350XL models?

A: The 34-350XLFT includes an integral male 45° flare SAE test fitting (FT suffix), which simplifies backflow testing procedures compared to the standard model.

Q: Can this valve be installed vertically or only horizontally?

A: The Zurn 34-350XLFT is certified for both horizontal and vertical installation, providing flexibility for various plumbing configurations.

Q: What accessories are available for this double check valve assembly?

A: Available accessories include repair kits, thermal expansion tanks (Model XT), QT-SET Quick Test Fitting Sets, and winterizing blow out/flush fittings for comprehensive system maintenance.

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