The 3" 350AOSY Double Check Backflow Assembly, with flanged end OS&Y gate valves, protects against backsiphonage and backpressure in low health hazard applications for all market segments. The use of our Patented Compound Check guarantees reliable performance and improved flow characteristics. The backflows single access cover reduces maintenance downtime, while the grooved, epoxy-coated ductile iron body provide corrosion-resistance. Its lightweight design and short lay-length ensures easy, compact installation.

• Patented Compound Check ensures reliable, long-lasting performance and improved flow characteristics
• Installation approved and compliant in horizontal and vertical positions
• Complete epoxy coating inside and outside of valve body eliminating exposure to corrosion
• Lightweight design and short lay-length ensures easy, compact installation
• ASSE® Listed
• AWWA Compliant
• IAPMO® Listed
• CSA® Certified
• UL® and C-LU® Classified
• FM® Approved