Zurn Wilkins RK212-350CK2 Backflow Preventer Second Check Assembly Repair Kit for 2-1/2" and 3" 375/350/475/450

Zurn Wilkins RK212-350CK2 Backflow Preventer Second Check Assembly Repair Kit – 2-1/2" & 3".

Product Overview

The Zurn Wilkins RK212-350CK2 is an OEM second check assembly repair kit designed for use with 2-1/2" and 3" Zurn Wilkins backflow preventers. Engineered for the 375, 350, 475, and 450 series, this kit provides all the essential components needed to restore reliable performance to the #2 check section of your assembly.

This genuine Zurn Wilkins kit helps extend the service life of your backflow preventer, ensuring dependable backflow protection and compliance with local inspection requirements.

Features & Benefits

• Genuine OEM Part – Manufactured by Zurn Wilkins for guaranteed compatibility and reliability.

• Complete Kit – Includes all components for #2 check section repairs, reducing downtime.

• Fits Multiple Models – Compatible with 2-1/2" and 3" backflow preventers in the 375, 350, 475, and 450 series.

• Durable Materials – Built with corrosion-resistant elastomers and hardware for long service life.

• Maintains Compliance – Keeps your backflow preventer functioning to meet inspection and code requirements.

Kit Contents

• Seat Retainer #2

• O-Ring – Seat

• Nut – Poppet Retainer

• Washer – #2 Check

• O-Ring – Stem

• Poppet Retainer

• Seal Ring

• Seat Assembly – #2 Poppet

Compatibility

Repairs the following Zurn Wilkins models:

• 212-375, 212-350, 212-475, 212-450

• 3-375, 3-350, 3-475, 3-450

Important Note:

• Does not repair "A" style bodies (e.g., 212-350A).

• Does not repair "AST" style bodies (e.g., 212-350AST).

Installation Tips

• Shut off water supply and relieve pressure before disassembly.

• Follow Zurn Wilkins service instructions for removal and replacement of #2 check assembly.

• Lubricate O-rings with an approved lubricant to ensure a proper seal.

• Always test the backflow preventer after repairs to confirm proper operation.

FAQs

Q: Can this kit be used on potable water systems?
Yes. The repair kit restores function to Zurn Wilkins assemblies approved for potable water where applicable.

Q: How do I know if I need a second check repair kit?
If your #2 check fails a backflow test or shows leakage, rebuilding with this kit is recommended.

Q: How long does installation take?
Typically less than an hour for trained technicians, depending on system accessibility.