The Wilkins RK4-350CK1 is a comprehensive repair kit designed to restore first check performance and sealing integrity for 2-1/2" – 4" backflow prevention assemblies.

Key Specifications:

• Size: 2-1/2" – 4"
• Compatibility: Models 350A, 350ADA, select 350/350DA/450/450DA
• Kit Contents: Complete check assembly components
• Application: First check repair kit
• Design Purpose: In-field rapid repair

Other Related Variants:

• RK212-350CK1: Limited to 2-1/2" – 3" sizes
• RK6-350CK1: For 6 Inches valves
• RK8-350CK1: For 8" – 12" large-diameter valves

Materials:

• Seat Retainer #1
• O-Ring Check
• Bolt Poppet Retainer
• Handle #1 Poppet Assembly
• Washer Poppet Bolt
• O-Ring Poppet Bolt
• Poppet Retainer
• Seal Ring
• Seat Assembly #1 Poppet
• Lubricant

Typical Installation:

This repair kit is designed for in-field servicing and maintenance of backflow prevention assemblies in commercial, industrial, and municipal water distribution systems where reliable check valve performance and sealing integrity are critical to maintaining system compliance and protection.

Standards Compliance:

Designed for use with assemblies meeting ASSE 1013, USC FCCCHR, AWWA C510, and CSA B64.4 standards

Features & Benefits:

• Complete Assembly: Includes all necessary components for comprehensive #1 check repair in one convenient kit.
• Performance Restoration: Designed specifically to restore first check performance and sealing integrity to original specifications.
• Rapid Field Repair: Supports quick in-field maintenance and repair, minimizing system downtime and service disruption.
• Wide Compatibility: Compatible with multiple 2-1/2", 3", and 4" models including 350A, 350ADA, and select 350/350DA/450/450DA assemblies.

FAQ

Q: Which Wilkins models is the RK4-350CK1 repair kit compatible with?

A: The Zurn RK4-350CK1 is compatible with 2-1/2", 3", and 4" Models 350A and 350ADA, as well as 4" Models 350, 350DA, 450, and 450DA.

Q: What components are included in this repair kit?

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

Q: What is the difference between the RK4-350CK1 and other related repair kits?

A: The RK4-350CK1 covers 2-1/2" – 4" sizes. The RK212-350CK1 is limited to 2-1/2" – 3" sizes, the RK6-350CK1 is for 6" valves, and the RK8-350CK1 is for 8" – 12" large-diameter valves.

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