The Wilkins RK4-350CK2 is a comprehensive #2 Check Assembly repair kit designed for mid-range backflow prevention valves, ensuring reliable performance and extended service life across multiple model families.

Key Specifications:

• Compatible Sizes: 2-1/2", 3", 4" Inches
• Compatible Models: 350, 350A, 350DA, 375A, 450DA, 475DAV
• Kit Components: 9 essential replacement parts
• Application: Second check assembly replacement
• Design Focus: Mid-range valve maintenance

Other Related Variants:

• RK212-350CK2: Limited to 2-1/2" – 3" sizes
• RK6-350CK2: For 6 Inches valves
• RK8-350CK2: For 8" – 12" large-diameter valves

Materials:

• Seat Retainer #2
• O-Ring Check
• Poppet Retainer with Bolt
• Washer for Poppet Bolt
• O-Ring for Poppet Bolt
• Seal Ring
• Seat Assembly #2 Poppet
• Lubricant

Typical Installation:

This Zurn RK4-350CK2 repair kit is designed for servicing second check assemblies in backflow prevention systems installed in commercial, industrial, and residential water distribution applications where mid-range valve maintenance is required across the 350, 375, 450, and 475 model families.

Standards Compliance:

Designed for use with ASSE-listed and approved backflow prevention assemblies

Features & Benefits:

• Complete Assembly Kit: Includes all 9 components needed for comprehensive #2 check assembly replacement, eliminating the need for separate part orders.
• Multi-Model Compatibility: The Wilkins RK4-350CK2 supports multiple backflow model families (350, 350A, 350DA, 375A, 450DA, 475DAV) across three valve sizes, simplifying inventory management.
• Extended Service Life: Quality-engineered components including seat assemblies, O-rings, and seal rings restore optimal valve performance and extend operational reliability.
• Simplified Maintenance: Pre-packaged with all necessary parts and lubricant for efficient field service and reduced downtime during routine maintenance procedures.

FAQ

Q: What valve models and sizes is the RK4-350CK2 compatible with?

A: The Zurn RK4-350CK2 is compatible with 2-1/2", 3", and 4" Models 375A and 350ADA, as well as 4" Models 375, 350, 475, and 450. It supports multiple backflow prevention valve families requiring second check assembly replacement.

Q: What components are included in this repair kit?

A: The kit includes Seat Retainer #2, O-Ring Check, Bolt Poppet Retainer, Washer Poppet Bolt, O-Ring Poppet Bolt, Poppet Retainer, Seal Ring, Seat Assembly #2 Poppet, and Lubricant—everything needed for complete #2 check assembly replacement.

Q: How does the RK4-350CK2 differ from other variants?

A: The RK4-350CK2 covers mid-range sizes (2-1/2" to 4"), while RK212-350CK2 is limited to smaller 2-1/2"–3" sizes, RK6-350CK2 serves 6" valves, and RK8-350CK2 handles large 8"–12" diameter applications.

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