Zurn RK4-350 Lead-Free Standard Repair Kit

The Zurn Wilkins RK4-350 is a genuine standard repair kit for 2-1/2" to 4" Model 350 / 350A / 350DA / 375. This model is certified lead-free for potable-water installations.

The Standard Repair Kit is compatible with the 2-1/2”-4” Model 350A, 375, and 475, and the 4” Model 350 and 450 Backflow Preventer. Repair Kit components conveniently include two Check O-Rings, eight Poppet Bolt O-Rings, and two Seal Rings. Repair Kits are sold as accessories for quick and simple repair needs, providing long-lasting protection from both backsiphonage and backpressure of polluted water into the potable water supply.

Features

• Accessories allow for speedy repairs
• Repair Kits provide cost savings by avoiding full replacement
• Complies with ASSE® Listed 1015 and CSA® Classified B64.5
• Quality materials designed for long-lasting parts replacement
• 1-year limited warranty

Common Questions

Will this kit fit my assembly?

The RK4-350 fits 2-1/2" and 4" sizes of Model 350 / 350A / 350DA / 375 / 450 / 475. Kits are size- and series-specific, so match the model stamped on your valve body or cover before ordering.

What's included in this kit?

This is a standard repair kit -- it carries the factory parts for that subassembly only, not a whole-assembly rebuild.

Are these genuine Zurn Wilkins parts?

Yes. This is the factory RK4-350 kit built with genuine Zurn Wilkins OEM components. Aftermarket parts can void your assembly approval and are commonly rejected by inspectors at annual test time.

Specifications

• Type: Standard Repair Kit, 2-1/2" - 4" 350A, 4" 350DA
• MPN: RK4-350
• Lead-Free: Yes
• Fits Series: 350;350A;350DA;375;450;475
• Fits Size: 2-1/2";4"
• Kit Type: Standard Repair Kit