The Wilkins 1-975XL2S is a reduced pressure principle backflow preventer with integrated bronze 'Y' type strainer, designed for high-hazard protection on potable water lines against backsiphonage and backpressure contamination.

Key Specifications:

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

Other Related Variants:

• 3/4-975XL2S: 3/4 Inches version
• 1-975XL2S: 1 Inches version
• 1 1/2-975XL2S: 1 1/2 Inches version
• 2-975XL2S: 2 Inches version

Materials:

• Low Lead Cast Bronze Body (ASTM B 584)
• Low Lead Cast Bronze Access Covers (ASTM B 584)
• Noryl™ Polymers
• Silicone Elastomers
• Buna Nitrile Elastomers
• Stainless Steel Springs (300 Series)
• Stainless Steel Fasteners (300 Series)
• Stainless Steel Ball Valve Handles

Typical Installation:

The Wilkins 1-975XL2S shall be installed on potable water lines in accordance with manufacturer's instructions and the latest edition of the Uniform Plumbing Code. 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. Installation shall be made so that no part of the unit can be submerged. If installed indoors, the installation shall be supplied with an air gap adapter to prevent flooding.

Standards Compliance:

ASSE Listed 1013; cUPC Listed; CSA Certified B64.4; AWWA Compliant C511; NSF/ANSI/CAN 61 and 372; UL Classified; C-UL Classified; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California

Features & Benefits:

• High-Hazard Backflow Protection: Protects potable water supply from both backsiphonage and backpressure contamination where health hazards exist.
• Integrated Strainer: Bronze 'Y' type strainer provides added protection against debris, reducing maintenance requirements and extending component life.
• Lead-Free Compliance: Meets NSF/ANSI/CAN 61 and 372 requirements with less than 0.25% weighted average lead content for safe drinking water applications.
• Serviceable Design: First and second checks are accessible for maintenance without removing the relief valve or entire device from the line, minimizing downtime.

FAQ

Q: What is the minimum and maximum installation height for the Zurn 1-975XL2S?

A: The Zurn 1-975XL2S must be installed 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 1-975XL2S be installed outdoors?

A: Yes, the assembly can be installed outdoors with a protective enclosure. For indoor installations, an air gap fitting is required above the floor drain.

Q: Are the check valves serviceable without removing the entire unit?

A: Yes, both the first and second check valves are accessible for maintenance without removing the relief valve or the entire device from the line, allowing for easier servicing.

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