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The Wilkins 112-975XL3 is a lead-free reduced pressure principle backflow preventer designed to protect potable water systems against backsiphonage and backpressure where a potential health hazard exists.

Key Specifications:

• Size: 1 1/4 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 ANSI B1.20.1

Other Related Variants:

• 114-975XL3: 1 1/4 Inches model size
• 12-975XL3: 1/2 Inches model size
• 1-975XL3: 1 Inches model size
• 2-975XL3: 2 Inches model size
• 34-975XL3: 3/4 Inches model size

Materials:

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

Typical Installation:

The Zurn 112-975XL3 is designed for installation on potable water lines to protect against both backsiphonage and backpressure of contaminated water into the potable water supply. Local codes shall govern installation requirements. 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. If installed indoors, the installation shall be supplied with an air gap adapter.

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; NSF/ANSI/CAN 61; NSF/ANSI/CAN 372

Features & Benefits:

• Lead-Free Construction: Meets NSF/ANSI/CAN 372 standards with less than 0.25% weighted average lead content for safe potable water applications.
• Dual Protection: Protects against both backsiphonage and backpressure of contaminated water into potable water supply systems.
• Easy Maintenance Access: First and second checks are accessible for maintenance without removing the relief valve or the entire device from the line.
• Full Port Ball Valves: Standard full port QT ball valves with integral male 45° flare SAE test fittings provide convenient testing and shutoff capability.

FAQ

Q: What is the minimum and maximum working water pressure for the Zurn 112-975XL3?

A: The minimum working water pressure is 25 PSI and the maximum working water pressure is 175 PSI.

Q: At what height should this backflow preventer be installed?

A: Unless otherwise specified by local codes, 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 checks be serviced without removing the entire unit?

A: Yes, the first and second checks share a single access cover and are accessible for maintenance without removing the relief valve or the entire device from the line. Test cocks are accessible from the top of the device.

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