The Wilkins RK4-375CK1 is a comprehensive #1 check assembly repair kit designed to restore first check valve sealing and operation in backflow preventers without requiring full unit replacement.

Key Specifications:

• Size Compatibility: 2 1/2 to 4 Inches
• Compatible Models: 375A, 375ADA, 375, 375DA, 475, 475DA
• Function: Restores first check valve sealing
• Warranty: 1-year limited warranty
• Kit Components: Complete assembly with seals and lubricant

Other Related Variants:

• RK4-375CK2: #2 Check Assembly Repair Kit

Materials:

• Seat assembly components
• O-ring seals
• Metal poppet assembly
• Seal rings
• Washers
• Bolts and retainers

Typical Installation:

Designed for repair and maintenance applications in commercial, industrial, and institutional facilities where backflow prevention is required. The Zurn RK4-375CK1 is suitable for potable water systems requiring periodic maintenance of the first check assembly in double check valve assemblies and reduced pressure zone assemblies.

Standards Compliance:

ASSE 1015; USC FCCCHR; IAPMO; CSA

Features & Benefits:

• Cost-Effective Repair: Allows repair without replacing entire backflow preventer assembly, reducing maintenance costs.
• Complete Kit: Includes all necessary components including check assembly, seals, O-rings, poppet, retainers, bolts, washers, and lubricant for comprehensive repair.
• Wide Compatibility: Fits multiple Zurn RK4-375CK1 backflow preventer models including 2 1/2 inch and 3 inch Models 375A and 375ADA, and 4 inch Models 375, 375DA, 475, and 475DA.
• Restores Performance: Effectively restores first check valve sealing and operation to original specifications, ensuring continued backflow protection.

FAQ

Q: Which backflow preventer models are compatible with this repair kit?

A: This kit fits 2 1/2 inch and 3 inch Models 375A and 375ADA, as well as 4 inch Models 375, 375DA, 475, and 475DA backflow preventers.

Q: What components are included in the repair kit?

A: The kit includes the #1 check assembly, seat retainer, seat assembly #1 poppet, poppet retainer, poppet bolt, seal ring, seat O-ring, poppet bolt O-ring, washer, and lubricant.

Q: Can I repair my backflow preventer instead of replacing the entire unit?

A: Yes, this repair kit allows you to restore the first check valve sealing and operation without replacing the entire backflow preventer, providing a cost-effective maintenance solution.

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