The Wilkins 1-375XL is a reduced pressure principle assembly designed for potable water protection against backsiphonage and backpressure contamination.

Key Specifications:

• Size: 1 Inches
• Maximum Working Pressure: 175 PSI
• Maximum Working Temperature: 180°F
• Notable Certifications: ASSE 1013, CSA B64.4
• End Connections: Threaded FNPT ANSI B1.20.1

Other Related Variants:

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

Materials:

• Reinforced Nylon Housing (FDA approved)
• Stainless Steel Fasteners (300 Series)
• Silicone Elastomers (FDA Approved)
• Buna Nitrile Elastomers (FDA Approved)
• Delrin Internals
• Nylon Internals
• Stainless Steel Springs (300 series)
• Low Lead 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; NSF/ANSI/CAN 61 and 372

Features & Benefits:

• Dual Protection: Provides comprehensive protection against both backsiphonage and backpressure contamination in potable water systems.
• Lead-Free Construction: Meets NSF/ANSI/CAN 372 requirements with less than 0.25% weighted average lead content for safe drinking water applications.
• Durable Materials: Features reinforced nylon housing with FDA-approved elastomers and stainless steel components for long-lasting performance.
• Versatile Installation: Suitable for indoor or outdoor installation with optional air gap and strainer configurations available.

FAQ

Q: What is the difference between the Zurn 1-375XL and standard backflow preventers?

A: The Zurn 1-375XL features a lead-free reinforced nylon body that meets NSF/ANSI/CAN 372 standards, making it ideal for potable water applications where health hazards exist. It provides protection against both backsiphonage and backpressure.

Q: What are the installation height requirements for the Wilkins 1-375XL?

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. No part of the unit can be submerged.

Q: Can this backflow preventer be used outdoors?

A: Yes, the Wilkins 1-375XL can be installed outdoors with a protective enclosure. For indoor installations, an air gap adapter is required. The unit is rated for temperatures up to 180°F and pressure up to 175 PSI.

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