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The Wilkins 2-950XLTBFSS is a top access double check valve assembly with butterfly shutoff valves and supervisory switch, providing reliable low hazard backflow protection against backsiphonage and backpressure in potable water systems.

Key Specifications:

• Size: 2 Inches
• Maximum Working Water Pressure: 75 PSI
• Maximum Working Water Temperature: 180°F
• Notable Certifications: ASSE 1015, UL Classified
• End Connections: FNPT inlet/outlet

Other Related Variants:

• None

Materials:

• Body & Access Covers: Bronze ASTM B584
• Check Springs: 300 series stainless steel
• Fasteners: 300 series stainless steel
• Seat Rings: Noryl (NSF Listed)
• Elastomers: Silicone

Typical Installation:

The Zurn 2-950XLTBFSS is installed in potable water service lines where low hazard backflow protection is required. Installation can be horizontal or vertical (with flow upward). Indoor installation is preferred in areas subject to freezing conditions. When installed outdoors, the device must be protected against freezing conditions with protective enclosures. The unit must be installed at least 12 inches above surrounding flood level. Top access check covers allow maintenance without removing the unit from the line. Test ports protected by plugs prevent fouling.

Standards Compliance:

ASSE Listed 1015; UL Classified; C-UL Classified; NSF/ANSI/CAN 61; NSF/ANSI/CAN 372; Approved by the Foundation for Cross Connection Control & Hydraulic Research at USC

Features & Benefits:

• Low Hazard Protection: Provides protection against both backsiphonage and backpressure in potable water applications where health hazard does not exist.
• Top Access Design: Check covers allow maintenance and servicing without removing the unit from the line, reducing downtime and installation disruption.
• Butterfly Shutoff Valves with Supervisory Switch: Equipped with butterfly shutoff valves and supervisory switch for enhanced monitoring and control capabilities.
• Durable Construction: Bronze body, stainless steel springs and fasteners, and silicone elastomers ensure long-lasting performance and compliance with lead-free standards.

FAQ

Q: Can the 2-950XLTBFSS be installed vertically?

A: Yes, vertical installation is acceptable in applications where inlet and outlet piping are flowing vertically upwards. All basic installation instructions apply to vertical installations.

Q: How often should the Wilkins 2-950XLTBFSS be tested?

A: The 2-950XLTBFSS must be inspected and maintained by licensed personnel at least once a year or more frequently as specified by local codes.

Q: What is the minimum static pressure drop required for proper check valve operation?

A: The static pressure drop across each check valve (both #1 and #2) shall be at least 1.0 psid during testing to ensure proper tightness and operation.

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