The Wilkins 1-950XLT is a top access double check valve assembly designed to protect against backsiphonage and backpressure of polluted water into potable water supply systems.

Key Specifications:

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

Other Related Variants:

• 112-950XLT: 1 1/2 Inches model size
• 2-950XLT: 2 Inches model size
• 34-950XLT: 3/4 Inches model size

Materials:

• Main Valve Body: Cast Bronze ASTM B 584
• Access Covers: 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 (305mm) and a maximum of 30 inches (762mm) 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 1015; cUPC; AWWA C510; CSA B64.5; NYC MEA 426-89-M VOL 3

Features & Benefits:

• Top Access Design: The Zurn 1-950XLT provides top access maintenance with checks located at a 45° angle, allowing for service without removing the device from the line.
• Durable Construction: Features cast bronze body and access covers per ASTM B 584, with 300 series stainless steel fasteners and springs for long-lasting performance.
• Full Port Ball Valves: The Zurn 1-950XLT is supplied with full port ball valves for maximum flow capacity and efficient operation.
• Protected Test Cocks: Test cocks include protective plugs to prevent fouling from insects, dirt, and debris, ensuring reliable testing and maintenance.

FAQ

Q: What is the maximum working pressure for the Wilkins 1-950XLT?

A: The maximum working water pressure is 175 PSI, with a hydrostatic test pressure of 350 PSI.

Q: Can this assembly be installed vertically?

A: Yes, certain sizes are approved for vertical flow-up installation. Check specific certifications for your size.

Q: What installation heights are required?

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.

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