The Wilkins 12-975XLST is a stainless steel reduced pressure principle backflow preventer designed for potable water protection against backsiphonage and backpressure contamination hazards.

Key Specifications:

• Size: 1/2 Inches
• Maximum Working Water Pressure: 175 psi
• Maximum Working Water Temperature: 180°F
• Notable Certifications: ASSE 1013, NSF/ANSI 372
• Connection Type: FNPT threaded connections

Other Related Variants:

• None

Materials:

• Main Valve Body: Stainless Steel ASTM A 351
• Access Covers: Stainless Steel ASTM A 351
• Internals: Stainless Steel, 300 Series
• Elastomers: Silicone (FDA approved), Buna Nitrile (FDA approved)
• Polymers: Noryl™
• Springs: Stainless Steel, 300 Series
• Ball Valves: Stainless Steel ASTM A 351
• Test Cocks: Stainless Steel ASTM A 351

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 and a maximum of 30 inches 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 or where relief valve discharge could cause damage.

Standards Compliance:

ASSE Listed 1013; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California; NSF/ANSI 372; ANSI B1.20.1

Features & Benefits:

• Health Hazard Protection: Provides protection where a potential health hazard exists, safeguarding potable water systems from contamination hazards.
• Corrosion-Resistant Construction: Stainless steel construction is ideal for systems utilizing liquids corrosive to copper alloys, including food processing, distilleries, and breweries.
• Lead-Free Compliance: Certified to NSF/ANSI 372, making the Zurn 12-975XLST ideal for applications requiring lead-free valves.
• Easy Maintenance Access: Checks oriented at 45° angle upward and accessible for maintenance without removing the relief valve or the entire device from the line.

FAQ

Q: What applications is the Zurn Wilkins 12-975XLST suitable for?

A: The 12-975XLST is ideal for medical diagnostic equipment, food processing, distilleries, breweries, and any application requiring corrosion-resistant, lead-free backflow prevention in potable water systems.

Q: What is the required installation clearance for this backflow preventer?

A: The assembly must 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.

Q: Can the checks be serviced without removing the entire unit?

A: Yes, the checks are oriented at a 45° angle upward and are accessible for maintenance without removing the relief valve or the entire device from the line.

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