The Wilkins RK8-350CK2 is a comprehensive repair kit designed for second check assembly maintenance in 8"–12" backflow preventers, ensuring reliable performance in high-capacity water systems.

Key Specifications:

• Size: 8 Inches to 12 Inches
• Compatible Models: 350, 350A, 375, 450, 475
• Assembly Type: Second Check Assembly Components
• Kit Contents: 8 Essential Replacement Components
• Application: Large Backflow Preventer Maintenance

Other Related Variants:

• RK212-350CK2: Small sizes 2 1/2 Inches to 3 Inches
• RK4-350CK2: Mid-range up to 4 Inches
• RK6-350CK2: 6 Inches valves only

Materials:

• Seat Retainer #1
• Bolt Poppet Retainer
• Washer Poppet Bolt
• O-Ring Poppet Bolt
• Poppet Retainer
• Seat Assembly #2 Poppet
• Washer Seat Retainer
• Lubricant

Typical Installation:

This Zurn RK8-350CK2 repair kit is intended for second check maintenance in very large backflow preventers used in high-capacity commercial, industrial, and municipal water systems requiring reliable cross-connection control in 8", 10", and 12" valve assemblies.

Standards Compliance:

Designed for use with backflow preventers compliant with ASSE 1013, USC FCCCHR, AWWA C510, and applicable local plumbing codes

Features & Benefits:

• Complete Repair Solution: Includes all eight essential components needed for second check assembly maintenance, eliminating the need for multiple part orders.
• Wide Compatibility: Works with multiple model series (350, 350A, 375, 450, 475) across three valve sizes, providing versatile maintenance options.
• Extended Equipment Life: Regular maintenance using this Zurn RK8-350CK2 kit ensures continued reliable operation and extends the service life of large backflow preventers.
• Convenient Maintenance: Pre-packaged with lubricant and all necessary seals, washers, and retainers for streamlined service procedures.

FAQ

Q: Which valve models is this repair kit compatible with?

A: This kit is compatible with 8", 10", and 12" Models 350, 350A, 375, 450, and 475 backflow preventers for second check assembly maintenance.

Q: What components are included in this repair kit?

A: The kit includes Seat Retainer #1, Bolt Poppet Retainer, Washer Poppet Bolt, O-Ring Poppet Bolt, Poppet Retainer, Seat Assembly #2 Poppet, Washer Seat Retainer, and Lubricant.

Q: Can I use this kit for smaller valve sizes?

A: No, this kit is specifically designed for 8"–12" valves. For smaller sizes, use RK212-350CK2 (2 1/2"–3"), RK4-350CK2 (up to 4"), or RK6-350CK2 (6" only).

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