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Zurn Industries Backflow Prevention Preventers
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Zurn Industries 4'' 350Ast Double Check Backflow Preventer With OsAndY Gate Valves

SKU: 4-350ASTOSY

$8,246.00

List Price / Each

Prices and information shown are subject to verification by our showroom personnel. In the event of a discrepancy, we reserve the right to make any corrections necessary. Freight charges may be applicable to certain products - if so, freight charges will be quoted separately.

  • Product Type Preventer
  • Length 25.63"  Width 12.5"  Height 23.25"  Weight 242 lbs. 
  • View Complete Specs
  • Finish Polished Stainless Steel

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Product Details

Zurn Industries 4-350ASTOSY

The Zurn Wilkins 350AST Double Check Backflow Preventer features a stainless Steel body and lightweight design. It provides low hazard protection and resists corrosion. Multiple shut-off and end connections are available for installation versatility.


The 4'''' 350ASTOSY Double Check Backflow Assembly, with flanged end OS&Y gate valves, protects against backsiphonage and backpressure in low health hazard applications. The use of our Patented Compound Check guarantees reliable performance and improved flow characteristics, making installation ideal for lower-pressure systems. Its 304L grade stainless steel valve body and access covers are corrosion-resistant for lower lifetime maintenance costs. Its lightweight design and short lay-length also ensures easy, compact installation.


  • Finish Polished Stainless Steel
  • Collection 350AST
  • UPC 612052112220
  • Online Product ID 2972216
  • Product Line 480
  • Length 25.63"
  • Width 12.5"
  • Height 23.25"
  • Weight 242 lbs.
  • Made In USA
  • Made in USA yes
  • Low Lead Compliant yes
  • Material Ductile Iron,Stainless Steel
  • Unit Of Measure Each
  • Prop65 Warning Cancer and Reproductive Harm - www.P65Warnings.ca.gov
  • Minimum Order Quantity 1
  • Shipping L:35.25"x W:17.75"x H:30.5"

Additional information

  • ASSE® Listed 1015
  • AWWA Compliant C510 (with gates only), and C550
  • UL® Classified
  • C-UL® Classified
  • FM® Approved
  • CSA® Certified
  • Stainless steel body and access covers offer corrosion-resistance
  • Lightweight design and short lay-length ensures easy, compact installation
  • Ideal for any Backflow Preventer replacement
  • Model 350ASTR available for custom length, drop-in replacements

About This Brand

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