The Wilkins 34-975XLU is a 3/4-inch reduced pressure principle backflow assembly with union ball valves, designed to protect potable water from backsiphonage and backpressure in high-hazard, non-potable applications.

Key Specifications:

• Size: 3/4 Inches
• Maximum Working Pressure: 175 PSI
• Maximum Operating Temperature: 180°F
• Notable Certifications: ASSE 1013, cUPC, UL
• End Connections: Threaded ANSI B1.20.1

Other Related Variants:

• 1-975XLU: 1 Inch model size

Materials:

• Cast bronze body and access covers per ASTM B584
• Stainless steel 300 series fasteners
• Stainless steel 300 series springs
• Silicone elastomers
• Buna-N nitrile elastomers
• Noryl™ internal polymer components

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 1013; cUPC; UL; C-UL; CSA B64.4; AWWA C511; USC Foundation for Cross Connection Control; NYC MEA 425-89-M VOL 3

Features & Benefits:

• High Hazard Protection: Protects potable water supply from both backsiphonage and backpressure of contaminated water in non-potable applications.
• Durable Construction: Cast bronze body with stainless steel fasteners and springs ensures long-lasting performance and corrosion resistance.
• Maintenance Access: First and second checks are accessible for maintenance without removing the relief valve or the entire device from the line.
• Union Ball Valves Included: The Zurn 34-975XLU comes standard with full-port union ball valves for easy installation and service.

FAQ

Q: What installation height is required for the Wilkins 34-975XLU?

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

Q: Does the Zurn 34-975XLU require an air gap adapter for indoor installations?

A: Yes, indoor installations require an air gap adapter to ensure proper drainage and prevent submersion of the unit.

Q: What is the approximate installed weight of this backflow preventer?

A: The approximate installed weight with ball valves is 12 lbs (5.5 kg).

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