The Wilkins 1-375 is a reduced pressure principle backflow preventer designed for irrigation water lines to protect potable water supply from contamination caused by backpressure or backsiphonage.

Key Specifications:

• Available Sizes: 1/2", 3/4", 1", 1-1/4", 1-1/2", 2"
• 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:

• 112-375: 1 1/2 Inches version
• 114-375: 1 1/4 Inches version
• 12-375: 1/2 Inches version
• 2-375: 2 Inches version
• 34-375: 3/4 Inches version

Materials:

• Reinforced Nylon Housing
• Stainless Steel Fasteners (300 Series)
• Silicone Elastomers
• Buna Nitrile Elastomers
• Delrin and Nylon Internals
• Stainless Steel Springs (300 Series)
• Cast Bronze Ball Valves (ASTM B 584)
• Stainless Steel Struts (300 Series)

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" (305mm) and a maximum of 30" (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; AWWA compliant C511; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California

Features & Benefits:

• Health Hazard Protection: Zurn 1-375 provides protection against both backsiphonage and backpressure where a potential health hazard exists in irrigation systems.
• Durable Construction: Reinforced nylon body with stainless steel internals ensures long-lasting performance and reliability in demanding irrigation applications.
• High Temperature and Pressure Rated: The Zurn 1-375 handles up to 175 PSI working pressure and 180°F temperature, with hydrostatic test pressure of 350 PSI.
• Complete Installation Flexibility: Available with optional full port QT ball valves, street elbows, strainer, air gap configurations, and multiple size options from 1/2" to 2".

FAQ

Q: What is the required installation height for the Wilkins 1-375?

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: Can this backflow preventer be used for potable water applications?

A: No, the Model 1-375 is designed for non-potable water applications only, specifically for irrigation systems.

Q: What certifications does the Model 1-375 hold?

A: The unit is ASSE Listed 1013, cUPC Listed, CSA Certified B64.4, and AWWA compliant C511, ensuring compliance with major industry standards.

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