The Wilkins 112-975XL3S is a 1 1/2" lead-free reduced pressure principle backflow prevention assembly designed to protect potable water supplies from contamination.

Key Specifications:

• Size: 1 1/2 Inches
• Maximum Working Pressure: 25/175 PSI
• Maximum Working Temperature: 180°F (82°C)
• Notable Certifications: ASSE 1013, cUPC, CSA B64.4
• End Connections: FNPT ANSI B1.20.1

Other Related Variants:

• 1-975XL3S: 1 Inch version
• 114-975XL3S: 1 1/4 Inch version
• 12-975XL3S: 1/2 Inch version
• 2-975XL3S: 2 Inch version
• 34-975XL3S: 3/4 Inch version

Materials:

• Low Lead Cast Bronze ASTM B584 main valve body and access covers
• 300 Series Stainless Steel fasteners
• Silicone elastomers (FDA Approved)
• Buna Nitrile elastomers (FDA Approved)
• Noryl™ polymers
• 300 Series Stainless Steel springs
• 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 1013; cUPC; CSA B64.4; UL/C-UL Classified; AWWA C511; Foundation for Cross Connection Control and Hydraulic Research at USC; NSF/ANSI/CAN 61; NSF/ANSI/CAN 372

Features & Benefits:

• Health Hazard Protection: Provides protection against both backsiphonage and backpressure where a potential health hazard exists.
• Lead-Free Compliance: Meets NSF/ANSI/CAN 372 with less than 0.25% weighted average lead content for safe potable water applications.
• Easy Maintenance Access: 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 stainless steel components and FDA-approved elastomers ensures long-lasting performance up to 180°F.

FAQ

Q: What is the minimum working pressure required for the Zurn 112-975XL3S?

A: The minimum working water pressure required is 25 PSI.

Q: How should the Wilkins 112-975XL3S be installed for proper drainage?

A: The assembly must be mounted at a minimum of 12 inches and maximum of 30 inches above adequate drains with sufficient side clearance. The unit must not be submerged.

Q: Can this backflow preventer be paired with pressure reducing valves?

A: Yes, suggested pairings include Zurn 112-975XL3S with Model 500XL3, 600XL3, or 625XL3 pressure reducing valves for a complete system.

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