Wilkins RK8-350CK2 | Repair Kit – Check Assembly #2, 8"–12"
Wilkins RK8-350CK2 | Repair Kit – Check Assembly #2, 8"–12" is backordered and will ship as soon as it is back in stock.
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Key Terms & Conditions
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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).
NOTICE: Do not use with water that is unsafe or of unknown quality without adequate disinfection either before or after the system.
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Always consult with a licensed professional and check local codes before installation. For further details, check the Owners Manual.
Contact us at support@bottlefillingstations.com with any questions.




