The Wilkins 34-375S is a 3/4" Reduced Pressure Principle Assembly designed for irrigation systems, protecting potable water supplies from contamination with full port QT ball valves and bronze "Y" type strainer.

Key Specifications:

• Size: 3/4 Inches
• Maximum Working Pressure: 175 psi
• Maximum Working Temperature: 180°F
• Notable Certifications: ASSE 1013, cUPC, CSA B64.4
• End Connections: Threaded FNPT ANSI B1.20.1

Other Related Variants:

• 1-375S: 1 Inch 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 and Buna Nitrile
• Internals: Delrin, 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" (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 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 where potential health hazards exist in irrigation water lines.
• Durable Construction: Reinforced nylon housing with cast bronze ball valves and stainless steel components ensure long-lasting performance in demanding applications.
• Integrated Filtration: Bronze "Y" type strainer protects internal components from debris and extends service life of the Zurn 34-375S assembly.
• High Performance Ratings: Rated to 175 PSI working pressure and 180°F temperature with 350 PSI hydrostatic test pressure for reliable operation.

FAQ

Q: What is the required installation height for the Zurn 34-375S?

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 this backflow preventer be used for potable water applications?

A: No, the Wilkins 34-375S is designed for non-potable applications only, specifically for irrigation water lines.

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

A: Yes, if installed indoors, the installation shall be supplied with an air gap adapter to ensure proper drainage and prevent submersion.

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