The 3" 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.

• 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
• ASSE® Listed 1015
• AWWA Compliant C510 (with gates only), and C550
• UL® Classified
• C-UL® Classified
• FM® Approved
• CSA® Certified