Product Image 600 x 600 - 350DA

4-350DA - Double Check Detector Backflow Preventer

The Zurn Wilkins 350DA Double Check Detector Backflow Preventer is ideal for fire protection applications. Its metered bypass detects leaks and unauthorized water use. Used in low health hazard applications.

To view all options, see the Specification Sheet - BF-350DA

UPC: 612052044361

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Product Resources

Spec Sheets & Install

BIM / 3D Models / 2D Drawings

Related Documents

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Features And Benefits

  • 4" double check detector assembly - flanged gate valve connections
  • Short lay-length for small space installation and single access cover reduces maintenance downtime
  • For use in low health hazard applications
  • Reliable performance and improved flow characteristics from patented Compound Check
  • Resilient wedge OS&Y gate valves standard
  • Approved in horizontal and vertical positions
  • Available in flanged, grooved, or grooved x flanged end connections for installation versatility
  • No threads or taps in body or cover, eliminating exposure to corrosion
Proportion 65
Lead Free
Retrofit or Replacement
MasterSPEC
Zurn Wilkins
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Repair Parts

Check #1 Seat Retainer Repair Kit for 2-1/2" - 4" 350/375/450/475

Check #2 Seat Retainer Repair Kit for 2-1/2" - 4" Models 350/375/450/475

First Check Assembly Repair Kit for 2-1/2", 3" and 4" 350A/350ADA and 4" 350/350DA/450/450DA

Second Check Assembly Repair Kit for 2-1/2", 3" and 4" 375A/350ADA and 4" 375/350/475/450

Double Check Detector Assembly Bypass Replacement Kit for 4" 350DA/350ADA

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