The Wilkins 34-375XLFT is a reduced pressure principle backflow preventer assembly designed to protect potable water lines against backsiphonage and backpressure contamination.

Key Specifications:

• Size: 3/4 Inches
• Maximum Working Pressure: 175 PSI
• Maximum Working Temperature: 180°F
• Notable Certifications: ASSE 1013, cUPC, NSF/ANSI/CAN 372
• End Connections: FNPT Threaded

Other Related Variants:

• 12-375XLFT: 1/2 Inch version
• 1-375XLFT: 1 Inch version
• 112-375XLFT: 1 1/2 Inches version
• 2-375XLFT: 2 Inch version

Materials:

• Housing: Reinforced Nylon (FDA approved)
• Ball Valves: Low Lead Cast Bronze (ASTM B 584)
• Fasteners: Stainless Steel (300 Series)
• Springs: Stainless Steel (300 Series)
• Elastomers: Silicone (FDA Approved) and Buna Nitrile (FDA Approved)
• Internals: Delrin and Nylon
• Struts: Stainless Steel (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. The installation shall be made so that no part of the unit can be submerged.

Standards Compliance:

ASSE Listed 1013; cUPC Listed; CSA Certified B64.4; AWWA compliant C511; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California; NSF/ANSI/CAN 61 & 372

Features & Benefits:

• Lead-Free Design: Meets NSF/ANSI/CAN 372 standards with less than 0.25% weighted average lead content for safe potable water applications.
• Dual Protection: Provides protection against both backsiphonage and backpressure of contaminated water into potable water supply systems.
• Integrated Test Fitting: The Zurn 34-375XLFT features integral male 45° flare SAE test fitting for simplified testing and maintenance procedures.
• Durable Construction: Reinforced nylon housing with stainless steel fasteners and FDA-approved elastomers ensures long-lasting performance and reliability.

FAQ

Q: What is the recommended installation height for the Wilkins 34-375XLFT?

A: The assembly must be installed a minimum of 12 inches and maximum of 30 inches above an adequate floor drain with sufficient side clearance for testing and maintenance.

Q: Can this backflow preventer be used outdoors?

A: For indoor installations, an air gap adapter is required. Outdoor installations require a protective enclosure as shown in the installation diagrams.

Q: What is the maximum working pressure for this model?

A: The Zurn Wilkins 34-375XLFT has a maximum working water pressure of 175 PSI and a hydrostatic test pressure rating of 350 PSI.

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