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The Wilkins 1-975XL3U is a 1" Reduced Pressure Principle Backflow Prevention Assembly with Union Ball Valves designed to protect potable water supplies from contamination where a potential health hazard exists.

Key Specifications:

• Size: 1 Inches
• Maximum Working Pressure: 175 PSI
• Maximum Working Temperature: 180°F
• Notable Certifications: ASSE 1013, cUPC, CSA B64.4
• End Connections: Threaded FNPT ANSI B1.20.1

Other Related Variants:

• 112-975XL3U: 1 1/2 Inches size
• 2-975XL3U: 2 Inches size
• 34-975XL3U: 3/4 Inches size

Materials:

• Main valve body: Low Lead Cast Bronze ASTM B584
• Access covers: Low Lead Cast Bronze ASTM B584
• Fasteners: 300 Series Stainless Steel
• Elastomers: Silicone (FDA Approved)
• Elastomers: Buna Nitrile (FDA Approved)
• Polymers: Noryl™
• Springs: 300 Series Stainless Steel
• Ball valve handles: Stainless Steel

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" (305mm) and a maximum of 30" (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; UL Classified; C-UL Classified; AWWA Compliant C511; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California; Meets NSF/ANSI/CAN 61 and 372

Features & Benefits:

• Health Hazard Protection: Provides protection against both backsiphonage and backpressure of contaminated water into potable water supply where potential health hazards exist.
• Lead-Free Compliance: Constructed with low lead cast bronze meeting NSF/ANSI/CAN 372 standards, ideal for use where lead-free valves are required.
• Easy Maintenance Access: First and second checks are accessible for maintenance without removing the relief valve or entire device from the line, with test cocks accessible from the top.
• Union Ball Valve Convenience: Features union ball valves for simplified installation and removal for service without disturbing pipe connections.

FAQ

Q: What is the minimum working pressure required for the Zurn 1-975XL3U?

A: The minimum working water pressure is 25 PSI for proper operation of the Zurn 1-975XL3U assembly.

Q: Can the Wilkins 1-975XL3U be installed below ground or submerged?

A: No, the installation must be made so that no part of the unit can be submerged. It must be mounted 12" to 30" above adequate drains.

Q: What pressure reducing valves are recommended to pair with this backflow preventer?

A: Suggested PRV pairings include Model 500XL3, Model 600XL3, or Model 625XL3 Pressure Reducing Valves for a complete system.

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