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The Wilkins 1-950XLT2U is a top access double check valve assembly designed to protect potable water systems from backsiphonage and backpressure contamination. This model includes factory-installed union ball valves for simplified installation and servicing.

Key Specifications:

• Size: 1 Inches
• Maximum Working Water Pressure: 175 PSI
• Maximum Working Water Temperature: 180°F
• Notable Certifications: ASSE 1015, CSA B64.5, NSF/ANSI/CAN 61 & 372
• End Connections: Threaded ANSI B1.20.1

Other Related Variants:

• 2-950XLT2U: 2 Inches version

Materials:

• Main valve body: Low Lead Cast Bronze ASTM B 584
• Access covers: Low Lead Cast Bronze ASTM B 584
• Fasteners: Stainless Steel, 300 Series
• Elastomers: Silicone and Buna Nitrile
• Polymers: Noryl™
• Springs: Stainless steel, 300 series
• Test cock cover: Plastic
• Ball valve handles: Stainless steel

Typical Installation:

Local codes shall govern installation requirements. To be installed in accordance with the manufacturer's instructions and the latest edition of the Uniform Plumbing Code. Unless otherwise specified, the assembly shall 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. If installed below grade, be certain adequate drainage is provided to prevent the device from being submerged.

Standards Compliance:

ASSE Listed 1015; cUPC Listed; CSA Certified B64.5; AWWA Compliant C510; USC FCCCHR Approved; NSF/ANSI/CAN 61 & 372

Features & Benefits:

• Top Access Design: 45° angled check valves allow servicing from top without removing assembly from pipeline, reducing maintenance time and costs.
• Factory-Installed Union Ball Valves: U option includes full port ball valves for simplified installation and easy isolation during maintenance.
• Lead-Free Compliance: Meets NSF/ANSI/CAN 372 standards with less than 0.25% weighted average lead content for safe potable water applications.
• Dual Protection: Protects against both backsiphonage and backpressure from polluted water contamination in potable water supply systems.

FAQ

Q: Can the Zurn 1-950XLT2U be installed vertically?

A: Yes, the assembly is certified for both horizontal and vertical flow-up installations, though USC FCCCHR approval applies to horizontal installations only.

Q: What is the hydrostatic test pressure rating for this backflow preventer?

A: The Zurn 1-950XLT2U has a hydrostatic test pressure rating of 350 PSI, ensuring durable performance under high-pressure conditions.

Q: How is the test cock protected from contamination?

A: The assembly includes test cock plugs that protect against fouling caused by insects, dirt, and debris when not in use for testing.

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