The Wilkins 1-975XL3SAG is a lead-free reduced pressure principle backflow prevention assembly designed to protect potable water from contamination hazards.

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 threaded connections

Other Related Variants:

• 112-975XL3SAG: 1 1/2 Inches version
• 114-975XL3SAG: 1 1/4 Inches version
• 2-975XL3SAG: 2 Inches version
• 34-975XL3SAG: 3/4 Inches version

Materials:

• Low Lead Cast Bronze ASTM B584 (Main valve body and access covers)
• 300 Series Stainless Steel (Fasteners and springs)
• Silicone, FDA Approved (Elastomers)
• Buna Nitrile, FDA Approved (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 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; CSA Certified B64.4; UL Classified; C-UL Classified; AWWA Compliant C511; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California; Meets NSF/ANSI/CAN 61 & 372

Features & Benefits:

• Health Hazard Protection: Provides dual protection against both backsiphonage and backpressure of contaminated water into potable water supply systems.
• Lead-Free Construction: Meets NSF/ANSI/CAN 372 standards with less than 0.25% weighted average lead content for safe drinking water applications.
• Easy Maintenance Access: First and second checks are accessible through a single access cover without removing the relief valve or entire device from the line.
• Complete Protection Package: Includes integrated lead-free wye strainer and air gap accessory for comprehensive system protection and indoor installation compliance.

FAQ

Q: Is the air gap fitting required for all installations of the Zurn 1-975XL3SAG?

A: The included air gap fitting is required for indoor installations. For outdoor installations, a protective enclosure provided by others should be used instead.

Q: What is the minimum working water pressure for the Wilkins 1-975XL3SAG assembly?

A: The minimum working water pressure required for proper operation is 25 PSI, with a maximum working water pressure of 175 PSI.

Q: How much clearance is needed for installation and maintenance?

A: The assembly must be mounted between 12 and 30 inches above adequate drains with sufficient side clearance for testing and maintenance activities.

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