The Wilkins 34-975XL2 is a reduced pressure principle backflow preventer designed to protect potable water systems against backsiphonage and backpressure in high hazard applications.

Key Specifications:

• Size: 3/4 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:

• 1-975XL2: 1 Inch version
• 114-975XL2: 1 1/4 Inches version
• 112-975XL2: 1 1/2 Inches version
• 2-975XL2: 2 Inches version

Materials:

• Low Lead Cast Bronze (ASTM B 584) main valve body and access covers
• Stainless Steel 300 Series fasteners and springs
• Silicone elastomers
• Buna Nitrile 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 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.

Standards Compliance:

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

Features & Benefits:

• High Hazard Protection: Protects potable water supply against both backsiphonage and backpressure of contaminated water where health hazards exist.
• Lead-Free Construction: Zurn 34-975XL2 features low lead cast bronze construction meeting NSF/ANSI/CAN 372 standards with less than 0.25% weighted average lead content.
• Easy Maintenance Access: First and second checks are accessible for maintenance without removing the relief valve or the entire device from the line.
• Optional Flood Detection: Configurable with relief valve sensor to detect and signal excessive water discharge for property damage prevention.

FAQ

Q: What are the available size options for the Wilkins 34-975XL2 series?

A: The Zurn 34-975XL2 series is available in five sizes: 3/4 inch, 1 inch, 1 1/4 inch, 1 1/2 inch, and 2 inch configurations to accommodate various potable water system requirements.

Q: What is the maximum working pressure and temperature for this backflow preventer?

A: The unit is rated for a maximum working water pressure of 175 PSI and maximum working water temperature of 180°F, with a hydrostatic test pressure rating of 350 PSI.

Q: Where can the Model 975XL2 be installed?

A: The assembly can be installed both indoors and outdoors. It must be mounted between 12 inches minimum and 30 inches maximum above adequate drains with sufficient clearance for testing and maintenance, ensuring no part can be submerged.

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