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The Wilkins 1-375S is a reduced pressure principle backflow prevention assembly designed for irrigation water lines, protecting against backsiphonage and backpressure where health hazards exist.

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 FNPT ANSI B1.20.1

Other Related Variants:

• 34-375S: 3/4 Inches model size

Materials:

• Housing: Reinforced Nylon
• Ball Valves: Cast Bronze ASTM B584
• Fasteners: Stainless Steel, 300 Series
• Struts: Stainless Steel, 300 Series
• Springs: Stainless Steel, 300 Series
• Elastomers: Silicone
• Elastomers: Buna Nitrile
• Internals: Delrin
• Internals: Nylon

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

Standards Compliance:

ASSE 1013; cUPC; CSA B64.4; AWWA C511; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California

Features & Benefits:

• Backflow Protection: Provides protection against both backsiphonage and backpressure of contaminated water into potable water supply for non-potable irrigation applications.
• Durable Construction: Reinforced nylon housing with cast bronze ball valves and 300 series stainless steel components ensure long-lasting performance in demanding environments.
• Full Port Ball Valves: Standard QT full port ball valves provide easy shutoff and optimal flow characteristics for efficient system operation.
• Comprehensive Certifications: ASSE 1013 Listed, cUPC Listed, CSA B64.4 Certified, and AWWA C511 compliant for reliable code compliance and peace of mind.

FAQ

Q: What is the installation height requirement for the Zurn 1-375S?

A: The assembly must 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.

Q: Can the Wilkins 1-375S be used for potable water applications?

A: No, this assembly is designed for non-potable applications only, specifically for irrigation water lines.

Q: Is an air gap adapter required for all installations?

A: An air gap adapter is required for indoor installations. The unit must not be submerged and adequate drainage must be provided.

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