The Wilkins 1-975XL2 is a reduced pressure principle assembly designed for potable water protection against backsiphonage and backpressure in high-hazard applications.

Key Specifications:

• Size: 1 Inches
• Maximum Working Water Pressure: 175 PSI
• Maximum Working Water Temperature: 180°F
• Notable Certifications: ASSE 1013, NSF/ANSI/CAN 61, 372
• End Connections: Threaded ANSI B1.20.1

Other Related Variants:

• 34-975XL2: 3/4 Inches model size
• 114-975XL2: 1 1/4 Inches model size
• 112-975XL2: 1 1/2 Inches model size
• 2-975XL2: 2 Inches model size

Materials:

• Low Lead Cast Bronze ASTM B 584 (main valve body and access covers)
• Stainless Steel, 300 Series (fasteners and springs)
• Silicone (elastomers)
• Buna Nitrile (elastomers)
• Noryl™ (polymers)
• Stainless Steel (ball valve handles)

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; AWWA Compliant C511; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California; NSF/ANSI/CAN 61 and 372; UL Classified; C-UL Classified

Features & Benefits:

• Health Hazard Protection: Provides protection against both backsiphonage and backpressure where potential health hazards exist in potable water systems.
• Lead-Free Compliance: Low lead cast bronze construction with less than 0.25% weighted average lead content meets NSF/ANSI/CAN 61 and 372 standards for safe drinking water applications.
• Easy Maintenance Access: First and second checks are accessible for maintenance without removing the relief valve or the entire device from the line, reducing downtime and service costs.
• Flood Detection Option: Can be configured with a relief valve sensor (MS option) that detects and signals excessive water discharge for flood prevention and property protection.

FAQ

Q: What is the proper installation height for the Zurn 1-975XL2?

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 1-975XL2 be used for outdoor installations?

A: Yes, the Zurn 1-975XL2 can be installed outdoors when properly protected with an optional protective enclosure and adequate drainage provisions.

Q: What sizes are available for the 975XL2 series?

A: The 975XL2 series is available in five sizes: 3/4 inches, 1 inch, 1 1/4 inches, 1 1/2 inches, and 2 inches with threaded connections.

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