The Wilkins 1-975XL3SEU is a 1 Inch reduced pressure principle backflow preventer designed for high hazard protection in potable water systems against backsiphonage and backpressure contamination.

Key Specifications:

• Size: 1 Inches
• Maximum Working Water Pressure: 175 PSI
• Maximum Water Temperature: 180°F
• Notable Certifications: ASSE 1013, cUPC, CSA B64.4
• End Connections: FNPT with union ball valves

Other Related Variants:

• 34-975XL3SEU: 3/4 Inches 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 of contaminated water into potable water supply where potential health hazards exist.
• Lead-Free Construction: Less than 0.25% weighted average lead content, meeting NSF/ANSI/CAN 372 requirements for safe drinking water applications.
• Easy Maintenance Access: Union ball valves simplify service and 90° swept elbows aid in piping alignment; checks accessible from single cover without removing relief valve or entire device from line.
• Wide Operating Range: Rated for temperatures up to 180°F and pressures up to 175 PSI with robust low lead bronze construction and stainless steel components for durability.

FAQ

Q: What is the minimum installation height required for the Zurn 1-975XL3SEU?

A: The assembly must 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.

Q: What is the minimum working water pressure for the Zurn 1-975XL3SEU?

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

Q: Can the first and second checks be serviced without removing the entire device?

A: Yes, the 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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