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Zurn Wilkins  |  SKU: RK4-350PK

Wilkins RK4-350PK | Repair Pro-Kit for 350A, 350, 450 Backflow Preventers

Regular price $ 152.99

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Important Note on Delivery Times

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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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In stock units ship within 48 hours. Other units normally ship in 2-4 weeks.

Other

Orders that ship directly from a manufacturer normally have a firm shipping estimate but those dates are subject to change due to manufacturer production, inventory or shipping. We do our best to estimate ship dates but orders shipping directly from the manufacturer can have unexpected delays. We will confirm tracking information when orders ship directly from a manufacturer but may not have updates or estimates beyond the original estimate. Once your order is placed with the manufacturer, it may not be able to be cancelled even if it hasn't shipped yet.  

Please contact support@bottlefillingstations.com to confirm delivery time for a specific product or quantity. Or to inquire about an existing order. 


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 RK4-350PK is a standard repair pro-kit designed to restore check valve sealing and internal rubber components in Model 350A, 350, and 450 backflow preventers, ensuring reliable performance and compliance.

 

Key Specifications:

  • Compatibility: 2 1/2 to 4 Inches
  • Notable Certifications: Lead-free compliant
  • Kit Components: Complete seal and O-ring set
  • Application: Backflow preventer repair
  • Packaging: Poly bag

 

Other Related Variants:

  • Contact us for other Wilkins repair kits

 

Materials:

  • Rubber seal rings
  • Elastomer O-rings

 

Typical Installation:

The Zurn RK4-350PK is used for repair and maintenance of backflow preventer check assemblies in commercial, industrial, and municipal water supply systems where Model 350A (2 1/2 to 4 Inches), Model 350 (4 Inches), and Model 450 (4 Inches) backflow preventers are installed to protect potable water systems from contamination.

 

Standards Compliance:

Lead-free compliant

 

Features & Benefits:

  • Complete Restoration Kit: The Zurn RK4-350PK includes all necessary check seal rings, check O-rings, poppet bolt O-rings, and lubricant to fully restore check valve sealing and internal rubber components.
  • Wide Compatibility: Fits 2 1/2 to 4 Inches Model 350A and 4 Inches Model 350 and 450 backflow preventers, providing versatile repair solutions for multiple valve sizes.
  • Lead-Free Compliance: Constructed with lead-free materials including rubber seal rings and elastomer O-rings, meeting current safety and regulatory standards.
  • Convenient Packaging: Compact poly bag packaging simplifies storage, shipping, and ensures all components are organized for efficient maintenance work.

 

FAQ

 

Q: Which backflow preventer models are compatible with the Wilkins RK4-350PK repair kit?

A: The RK4-350PK is designed specifically for Model 350A (2 1/2 to 4 Inches), Model 350 (4 Inches), and Model 450 (4 Inches) backflow preventers.

Q: What components are included in this repair pro-kit?

A: The kit includes No. 1 and No. 2 check seal rings, check O-rings, poppet bolt O-rings, and lubricant necessary for complete internal component restoration.

Q: How often should backflow preventer check valves be serviced with this repair kit?

A: Backflow preventers should be tested and serviced annually or according to local code requirements. Use this kit when check valve sealing or internal rubber components show wear or failure during testing.

 

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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