The Wilkins 12-975XL3S is a reduced pressure principle backflow prevention assembly designed to protect potable water systems against backsiphonage and backpressure where potential health hazards exist.

Key Specifications:

• Size: 1/2 Inches
• Maximum Working Water Pressure: 175 PSI
• Maximum Working Water Temperature: 180°F
• Notable Certifications: ASSE 1013, cUPC, CSA B64.4
• End Connections: Threaded FNPT

Other Related Variants:

• 112-975XL3S: 1 1/2 Inches model size
• 114-975XL3S: 1 1/4 Inches model size
• 1-975XL3S: 1 Inches model size
• 2-975XL3S: 2 Inches model size
• 34-975XL3S: 3/4 Inches model size

Materials:

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

• Lead-Free Protection: Meets NSF/ANSI/CAN 372 with less than 0.25% weighted average lead content for safe potable water applications.
• Dual Protection Design: Provides protection against both backsiphonage and backpressure of contaminated water into potable water supply systems.
• Easy Maintenance Access: First and second checks are accessible for maintenance without removing the relief valve or the entire device from the line.
• Complete System Ready: Includes full port QT ball valves and integral male 45° flare SAE test fittings with Model SXL lead-free wye type strainer.

FAQ

Q: What is the minimum working pressure required for the Zurn 12-975XL3S?

A: The minimum working water pressure required is 25 PSI for proper operation of the Zurn 12-975XL3S assembly.

Q: Can this backflow preventer be installed in any orientation?

A: The assembly must be mounted at a minimum of 12 inches and maximum of 30 inches above adequate drains with sufficient side clearance for testing and maintenance, and no part of the unit can be submerged.

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

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

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