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The Wilkins 34-975XL3AG is a lead-free reduced pressure principle backflow preventer with air gap accessories, designed for compact potable water protection where health hazards exist.

Key Specifications:

• Size: 3/4 Inches
• Maximum Working Pressure: 175 PSI
• Maximum Working Temperature: 180°F
• Notable Certifications: ASSE 1013, cUPC, CSA B64.4
• End Connections: FNPT Threaded

Other Related Variants:

• 112-975XL3: 1/2 Inch size
• 1-975XL3: 1 Inch size
• 114-975XL3: 1 1/4 Inch size
• 12-975XL3: 1 1/2 Inch size
• 2-975XL3: 2 Inch size

Materials:

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

Typical Installation:

Designed for installation on potable water lines to protect against both backsiphonage and backpressure of contaminated water into the potable water supply. 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. Ideal for use where lead-free valves are required and assembly shall provide protection where a potential health hazard exists.

Standards Compliance:

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

Features & Benefits:

• Lead-Free Compliance: NSF/ANSI/CAN 372 certified with less than 0.25% weighted average lead content for safe potable water applications.
• Dual Protection: Protects against both backsiphonage and backpressure with reduced pressure principle design for maximum safety.
• Easy Maintenance Access: First and second checks accessible through single shared access cover without removing the relief valve or entire device from the line.
• Compact Design with Air Gap: Includes air gap accessories (AG) for proper indoor installation compliance and space-efficient installation.

FAQ

Q: What is the minimum working water pressure required for the Zurn 34-975XL3AG?

A: The minimum working water pressure required is 25 PSI to ensure proper operation of the backflow preventer.

Q: Can this backflow preventer be installed outdoors without the air gap accessory?

A: Yes, the air gap accessory is specifically required for indoor installations. Outdoor installations do not require the air gap adapter but should have protective enclosure.

Q: How do I access the check valves for maintenance on the Wilkins 34-975XL3AG?

A: The first and second check valves are accessible through a single shared access cover from the top of the device, allowing maintenance without removing the relief valve or the entire assembly from the line.

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