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Wilkins RK12-420FK repair kit: poppet, bonnet, float, seal ring and O-rings for 1/2–3/4 inch valves.

Wilkins RK12-420FK Freeze Repair Kit for 420/420XL

Brand: Zurn Industries, LLC
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$76.14
$57.10
SKU RK12-420FK

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The RK12-420FK Freeze Repair Kit restores the poppet and bonnet assemblies on Wilkins 420 and 420XL pressure vacuum breaker backflow preventers. It provides the replacement components needed to repair freeze-damaged or worn internal valve parts and maintain proper valve operation. This repair kit is intended for the 1/2" and 3/4" valve sizes and is supplied as a single complete service kit under SKU RK12-420FK.

  • Comprehensive kit includes float assembly, bonnet, poppet, seal ring, O-rings and lubricant for a complete repair.
  • Compatible with Wilkins models 420 and 420XL in 1/2" to 3/4" sizes — fits common field-installed irrigation and plumbing setups.
  • Parts included replace critical wetted components that are commonly affected by freezing, wear or debris.
  • O-rings and seal ring are supplied to restore watertight operation; lubricant included to ease installation and extend seal life.
  • Ideal for professional plumbers, irrigation contractors, and maintenance teams performing in-field repairs.

Installation should follow the manufacturer's Repair Parts and Installation & Maintenance documents supplied with the product. Inspect the valve body, seat and spring during service; replace any other damaged components as needed. If unsure, consult a qualified technician to ensure compliance with local codes and correct backflow prevention function.

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Frequently Asked Questions

What models does the RK12-420FK repair kit fit?
Fits Wilkins 420 and 420XL pressure vacuum breakers in 1/2" and 3/4" sizes. Confirm your valve model before ordering.
What parts are included in the kit?
Includes float assembly, bonnet, poppet, seal ring, O-rings and lubricant — everything needed for poppet/bonnet repairs.
Can I install this kit myself?
Basic component replacement may be possible for experienced DIYers, but backflow repairs should be performed by qualified personnel to meet code.
Where can I find installation instructions and parts diagrams?
See the supplied Repair Parts and Installation & Maintenance PDFs for models 420 and 420XL available on the product page or with the kit.

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