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Zurn Wilkins  |  SKU: RK4-375ASTCK1

Wilkins RK4-375ASTCK1 | #1 Check Assembly Repair Kit

Regular price $ 545.99

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For time-sensitive orders, please contact us directly so we can provide a more accurate lead time estimate based on your specific requirements.

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Special Case Shipping Rates

 

Please note that shipping rates are subject to change at any time.  We reserve the right to charge an additional fee in addition to the regularly advertised shipping fee for shipping to remote areas not easily accessible by typical freight carrier means (i.e. islands only accessible by ferry). If your order falls into this category, you will be notified upon receipt of your order, and have the option to complete the purchase with additional fee or to cancel the order.  Please note, these instances are very rare, as most locations are reachable by regular freight. If you have any questions, please contact us! 


Key Terms & Conditions

 

Exceptions may apply to islands and other remote territories.

All orders shipped by the carrier of our choice.  

 

 

 


 

 

 

The Wilkins RK4-375ASTCK1 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: 2 1/2 to 4 Inches
  • Kit Contents: Check assembly, retainer, lubricant
  • Compatibility: Models 375AST, 375ASTDA, 475ST, 475STDA
  • Function: First check valve repair
  • Warranty: 1-year limited warranty

 

Other Related Variants:

  • RK4-375ASTCK2: #2 Check Assembly Repair Kit

 

Materials:

  • Check assembly components
  • Retainer hardware
  • Assembly lubricant

 

Typical Installation:

Used for repair and maintenance of the first check assembly in backflow prevention systems including commercial buildings, industrial facilities, irrigation systems, and potable water supply protection applications where Models 375AST, 375ASTDA, 475ST, and 475STDA backflow preventers are installed.

 

Standards Compliance:

Compatible with assemblies meeting ASSE 1013, USC FCCCHR, AWWA C511 standards for reduced pressure principle backflow prevention assemblies

 

Features & Benefits:

  • Cost-Effective Repair: Allows repair without replacing entire backflow preventer, reducing maintenance costs and downtime.
  • Complete Kit: Includes all necessary components—check assembly, retainer, and lubricant—for comprehensive first check valve restoration.
  • Wide Compatibility: Fits multiple Zurn RK4-375ASTCK1 compatible models including 375AST, 375ASTDA, 475ST, and 475STDA in 2-1/2 inch to 4 inch sizes.
  • Reliable Performance: Restores proper first check valve sealing and operation, ensuring continued backflow prevention system integrity and compliance.

 

FAQ

 

Q: What backflow preventer models is this Zurn RK4-375ASTCK1 repair kit compatible with?

A: This kit is designed for 2-1/2 inch to 4 inch Models 375AST, 375ASTDA, 475ST, and 475STDA backflow preventers.

Q: What components are included in this repair kit?

A: The kit includes the #1 check assembly, retainer hardware, and assembly lubricant needed for complete first check valve repair.

Q: Can I repair just the first check valve without replacing the entire backflow preventer?

A: Yes, this repair kit allows you to restore first check valve sealing and operation without replacing the entire backflow prevention assembly, saving time and cost.

 

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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