The Wilkins 1-975XL3 is a lead-free reduced pressure principle backflow preventer designed for potable water systems requiring protection against backsiphonage and backpressure contamination.

Key Specifications:

• Size: 1 Inches
• Maximum Working Pressure: 175 PSI
• Maximum Working Temperature: 180°F
• Notable Certifications: ASSE 1013, cUPC, CSA B64.4
• End Connections: FNPT threaded ANSI B1.20.1

Other Related Variants:

• 12-975XL3: 1/2 Inches model size
• 34-975XL3: 3/4 Inches model size
• 114-975XL3: 1 1/4 Inches model size
• 112-975XL3: 1 1/2 Inches model size
• 2-975XL3: 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 (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" (305mm) and a maximum of 30" (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; UL Classified (less shut-off valves); C-UL Classified; AWWA Compliant C511; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California; NSF/ANSI/CAN 61; NSF/ANSI/CAN 372

Features & Benefits:

• Lead-Free Compliance: Meets NSF/ANSI/CAN 372 with less than 0.25% weighted average lead content for safe potable water applications.
• Accessible Maintenance Design: First and second checks are accessible for maintenance without removing the relief valve or entire device from the line.
• Durable Construction: Low-lead cast bronze body with Noryl™ internal components and stainless steel springs ensure long-lasting performance.
• Full Port Ball Valves: Standard full port QT ball valves with integral male 45° flare SAE test fittings provide reliable shut-off and testing capabilities.

FAQ

Q: What is the minimum working pressure required for the Zurn 1-975XL3?

A: The Zurn 1-975XL3 requires a minimum working water pressure of 25 PSI to function properly.

Q: Can the Model 975XL3 be installed outdoors?

A: Yes, the Model 975XL3 can be installed outdoors with a protective enclosure as shown in the installation diagram. Indoor installations require an air gap adapter.

Q: What is the installation height requirement for this backflow preventer?

A: The assembly must 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.

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