The Wilkins 1-975XL2U is a reduced pressure principle backflow prevention assembly designed to protect potable water supplies from contamination where a potential health hazard exists.

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: Threaded ANSI B1.20.1

Other Related Variants:

• 112-975XL2U: 1 1/2 Inches size
• 2-975XL2U: 2 Inches size
• 34-975XL2U: 3/4 Inches size

Materials:

• Main Valve Body: Low Lead Cast Bronze ASTM B584
• Access Covers: Low Lead Cast Bronze ASTM B584
• Fasteners: 300 Series Stainless Steel
• Elastomers: Silicone/Buna Nitrile
• Polymers: Noryl™
• Springs: 300 Series Stainless Steel
• Ball Valve Handles: Stainless Steel

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. For indoor installations, an air gap fitting is required.

Standards Compliance:

ASSE 1013; cUPC; CSA B64.4; AWWA C511; NSF/ANSI/CAN 61 & 372; UL/C-UL Classified; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California

Features & Benefits:

• Health Hazard Protection: Provides reliable protection against both backsiphonage and backpressure of contaminated water into potable water supply systems.
• Lead-Free Construction: Meets NSF/ANSI/CAN 61 & 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 for maintenance without removing the relief valve or entire device from the line.
• Union Ball Valve Configuration: The Zurn 1-975XL2U with union ball valves allows for easy installation and removal without cutting pipe.

FAQ

Q: What is the required installation height for the Wilkins 1-975XL2U?

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

Q: Can this backflow preventer be installed outdoors?

A: Yes, the Zurn 1-975XL2U can be installed outdoors in a protective enclosure or indoors with an air gap fitting as required by local codes.

Q: What type of connections does this model have?

A: The 1-975XL2U model features threaded end connections conforming to ANSI B1.20.1 standards with union ball valves for easy installation.

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