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The Wilkins 2-950XLTDABFSSLM is a double check detector backflow preventer designed for fire protection systems, providing reliable protection against backsiphonage and backpressure with supervisory switch monitoring.

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 inlet/outlet threaded

Other Related Variants:

• 2-950XLTDABFSS: Model with supervisory switches and water meter included

Materials:

• Main valve body: Cast Bronze ASTM B584
• Access covers: Cast Bronze ASTM B584
• Fasteners: Stainless Steel, 300 Series
• Elastomers: Silicone (FDA approved) and Buna Nitrile (FDA approved)
• Polymers: NSF Listed Noryl™
• 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 both horizontal and vertical orientations.

Standards Compliance:

ASSE Listed 1048; UL Classified; C-UL Classified; 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 compliant

Features & Benefits:

• Comprehensive Backflow Protection: The Zurn 2-950XLTDABFSSLM protects against both backsiphonage and backpressure in fire protection and potable water service lines.
• Supervisory Monitoring Capability: Equipped with butterfly valve supervisory switches (UL and FM approved) for indoor and outdoor use, enabling real-time monitoring of valve position.
• Flexible Installation: Approved for both horizontal and vertical installation orientations, providing versatility in system design and space constraints.
• Durable Construction: Bronze body with 300 series stainless steel internals and FDA-approved silicone elastomers ensure long-lasting performance and compliance with lead-free standards.

FAQ

Q: What is the "LM" designation in the Wilkins 2-950XLTDABFSSLM model number?

A: The "LM" suffix indicates "less meter," meaning this configuration includes the bypass arrangement ready for meter installation but does not include an installed water meter.

Q: Can the Zurn 2-950XLTDABFSSLM be installed vertically?

A: Yes, this assembly is approved for both horizontal and vertical installation according to ASSE 1048 standards and manufacturer specifications.

Q: What type of hazard protection does this backflow preventer provide?

A: This double check detector assembly provides protection where a low health hazard potential exists, suitable for fire protection systems with metered bypass to detect leaks and unauthorized water use.

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