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The Wilkins 1-975XLS is a reduced pressure principle backflow preventer designed to protect potable water lines against backsiphonage and backpressure contamination where potential health hazards exist.

Key Specifications:

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

Other Related Variants:

• N/A: No variants available for this specific based model

Materials:

• Main Valve Body: Cast Bronze ASTM B584
• Access Covers: Cast Bronze ASTM B584
• Fasteners: Stainless Steel (300 Series)
• Elastomers: Silicone and Buna Nitrile (FDA approved)
• Polymers: Noryl™ (NSF listed)
• Springs: 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 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.

Standards Compliance:

ASSE Listed 1013; cUPC Listed; UL Classified; C-UL Classified; CSA Certified B64.4; AWWA Compliant C511; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California; NYC MEA 425-89-M VOL 3

Features & Benefits:

• High Hazard Protection: Provides protection against both backsiphonage and backpressure of contaminated water into potable supply lines.
• Durable Construction: Cast bronze body with stainless steel fasteners and springs ensures long-lasting performance and corrosion resistance.
• Easy Serviceability: Separate access to checks and relief valve allows for maintenance without removing the entire device from the line.
• Integrated Strainer: Bronze "Y" type strainer (S option) protects internal checks and relief valve from debris.

FAQ

Q: What is the minimum and maximum installation height required for the Zurn 1-975XLS?

A: 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.

Q: Can the Wilkins 1-975XLS be used for potable water applications?

A: No, this assembly is designed for non-potable applications only to protect against contamination of potable water supply lines.

Q: How do I access the internal components for maintenance on the Zurn 1-975XLS?

A: The first and second checks are accessible for maintenance without removing the relief valve or the entire device from the line, providing easy serviceability.

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