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The Wilkins 2-950XLTDABFSS is a Double Check Detector Backflow Preventer Assembly designed to protect potable water in fire sprinkler systems from backsiphonage and backpressure.

Key Specifications:

• Size: 2 Inches
• Maximum Working Water Pressure: 175 PSI
• Maximum Working Water Temperature: 180°F
• Notable Certifications: ASSE 1048, UL, C-UL Classified
• End Connections: FNPT, ANSI B1.20.1

Other Related Variants:

• 2-950XLTDABFSSLM: Less meter version

Materials:

• Main valve body: Cast Bronze ASTM B 584
• Access covers: Cast Bronze ASTM B 584
• Fasteners: Stainless Steel, 300 Series
• Elastomers: Silicone (FDA approved)
• Elastomers: Buna Nitrile (FDA approved)
• Polymers: Noryl™, NSF Listed
• Springs: Stainless Steel, 300 series
• Test cock cover: Plastic

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. The installation shall be made so that no part of the unit can be submerged. Suitable for horizontal or vertical orientation.

Standards Compliance:

ASSE Listed 1048; UL Classified (horizontal & vertical); C-UL Classified (horizontal & vertical); AWWA Compliant C510; Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California; NSF/ANSI/CAN 61 & 372 (lead-free)

Features & Benefits:

• Dual Protection: Protects potable water from both backsiphonage and backpressure of polluted water in fire sprinkler systems.
• Leak Detection: Incorporates metered bypass to detect leaks and unauthorized water use for enhanced system monitoring.
• Supervisory Monitoring: Butterfly valve supervisory switches (SS option) provide remote indication of valve position and circuit status for fire alarm systems, UL and FM approved for indoor and outdoor use.
• Easy Maintenance: First and second check valves located at 45° angle and accessible from the top without removing device from line; test cock plugs protect ports from debris.

FAQ

Q: Can the Zurn 2-950XLTDABFSS be installed in both horizontal and vertical orientations?

A: Yes, the Zurn 2-950XLTDABFSS is approved for both horizontal and vertical installation per ASSE 1048, UL, and C-UL classifications.

Q: What is the purpose of the butterfly valve supervisory switches on this model?

A: The SS suffix indicates butterfly valve supervisory switches that are UL and FM approved, providing remote indication of valve position and circuit status for integration with fire alarm systems.

Q: Where should the Wilkins 2-950XLTDABFSS be installed?

A: Install on potable water connections in fire sprinkler systems where low health hazard backflow protection with supervisory monitoring is required, mounted 12 to 30 Inches above adequate drains.

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