The Wilkins 34-375 is a reduced pressure principle backflow assembly designed for irrigation systems, protecting against backsiphonage and backpressure in non-potable applications.

Key Specifications:

• Size: 3/4 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

Other Related Variants:

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

Materials:

• Reinforced Nylon housing
• Stainless Steel fasteners, 300 Series
• Silicone elastomers
• Buna Nitrile elastomers
• Delrin internals
• 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 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; AWWA compliant C511; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California

Features & Benefits:

• Dual Protection: Protects against both backsiphonage and backpressure of contaminated water into potable water supply for irrigation systems.
• Durable Construction: Reinforced nylon body with stainless steel internals ensures long-lasting performance and corrosion resistance in outdoor environments.
• High Pressure Rating: Hydrostatically tested to 350 PSI with 175 PSI maximum working pressure for reliable operation in demanding conditions.
• Versatile Configuration: Available in six sizes (1/2" to 2") with optional accessories including strainers, air gaps, and street elbows for flexible installation.

FAQ

Q: What is the difference between the Wilkins 34-375 and other Model 375 sizes?

A: The Zurn 34-375 is the 3/4 inch version of the Model 375 series. Other sizes include 1/2", 1", 1-1/4", 1-1/2", and 2" to accommodate different flow requirements for irrigation systems.

Q: Can the Zurn 34-375 be installed indoors?

A: Yes, the assembly can be installed indoors or outdoors. For indoor installations, it should be supplied with an air gap adapter (Model 375SAG option) and adequate drainage must be provided.

Q: What is the minimum and maximum installation height for the Wilkins 34-375?

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.

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