The Wilkins 1-975XLU is a reduced pressure principle backflow preventer engineered for high hazard protection on potable water lines, safeguarding against both backsiphonage and backpressure contamination.

Key Specifications:

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

Other Related Variants:

• 34-975XLU: 3/4 Inches version

Materials:

• Main Valve Body: Cast Bronze ASTM B 584
• Access Covers: Cast Bronze ASTM B 584
• Fasteners: Stainless Steel, 300 Series
• Elastomers: Silicone and Buna Nitrile
• Polymers: Noryl™
• 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 comprehensive protection against both backsiphonage and backpressure of contaminated water into potable water supply systems.
• Union Ball Valve Serviceability: Union ball valves allow easy removal of the assembly body from the line for winterization, testing, and maintenance without disrupting the entire system.
• Durable Bronze Construction: Cast bronze body and access covers ensure long-lasting performance and corrosion resistance in demanding water service applications.
• Accessible Check Valves: First and second checks are accessible for maintenance without removing the relief valve or entire device from the line, minimizing downtime.

FAQ

Q: What applications is the Zurn 1-975XLU suitable for?

A: The Zurn 1-975XLU is designed for installation on potable water service lines where high health hazard protection is required, including commercial and industrial applications requiring protection against contaminated water backflow.

Q: How does the union ball valve configuration benefit maintenance?

A: The union ball valves positioned between the body and shut-offs allow for easy body removal for winterization or maintenance without cutting pipes or disrupting the entire water line.

Q: What is the required installation height for the Wilkins 1-975XLU?

A: The Wilkins 1-975XLU 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, and no part of the unit can be submerged.

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