4-350ASTDA - Double Check Detector Backflow Preventer

The 350ASTDA Double Check Detector Backflow Preventer features a stainless Steel body, making it 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 - Model 350ASTDA

UPC: 612052112299

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Product Resources

Spec Sheets & Install

BIM / 3D Models / 2D Drawings

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Features And Benefits

  • 4" double check detector assembly with stainless Steel body
  • Short lay-length for small space installation
  • Reliable performance and improved flow characteristics from patented compound check, allowing for installation in lower-pressure systems
  • Available as 350ASTDAR for backflow replacements/retrofit
  • Lower maintenance costs from corrosion resistance of stainless body
  • Multiple shut-off and end connections available for installation versatility
  • Available in flanged, grooved, or grooved x flanged end connections for installation versatility
Proportion 65
Lead Free
Zurn Wilkins

Backflow Attributes

  • Grooved for steel pipe, flanged
  • Stainless steel
  • 2-1/2", 3", 4", 6", 8", 10"
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Repair Parts

Check #1 Seat Retainer Repair Kit for 2-1/2" - 4" 300AST Series & 400ST Series

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

First Check Assembly Repair Kit for 2-1/2", 3" and 4" 350AST/350ASTDA

Second Check Assembly Repair Kit for 3" and 4" 375AST/350AST

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