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The Wilkins 34-975XL3SEU is a reduced pressure principle backflow preventer designed for high hazard protection in potable water systems against backsiphonage and backpressure.

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: FNPT with union ball valves

Other Related Variants:

• 1-975XL3SEU: 1 Inch model size

Materials:

• Main valve body: Low Lead Cast Bronze ASTM B-584
• Access covers: Low Lead Cast Bronze ASTM B-584
• Fasteners: Stainless Steel, 300 Series
• Elastomers: Silicone (FDA Approved)
• Elastomers: Buna Nitrile (FDA Approved)
• Polymers: Noryl™
• Springs: Stainless Steel, 300 Series
• 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 (305mm) and a maximum of 30 inches (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 and 372

Features & Benefits:

• High Hazard Protection: Provides protection against both backsiphonage and backpressure where potential health hazards exist in potable water lines.
• Lead-Free Compliance: Constructed with low lead cast bronze materials meeting NSF/ANSI/CAN 372 with less than 0.25% weighted average lead content.
• Easy Maintenance Access: First and second checks accessible for maintenance without removing relief valve or entire device from the line; union ball valves simplify service.
• Swept Elbow Design: 90° street elbows aid in piping alignment and installation flexibility in tight spaces.

FAQ

Q: What is the minimum working water pressure required for the Zurn 34-975XL3SEU?

A: The minimum working water pressure required is 25 PSI to ensure proper operation of the backflow preventer.

Q: Can this backflow preventer be installed outdoors?

A: Yes, the Wilkins 34-975XL3SEU can be installed outdoors with a protective enclosure provided by others, or indoors with an air gap adapter supplied with the installation.

Q: How often does the Zurn 34-975XL3SEU require testing and maintenance?

A: Testing and maintenance should be performed according to local codes and regulations. Test cocks are accessible from the top of the device, and repair kits (RK34-975XL3) are available for servicing.

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