4" Double Check Assembly OSY Valve Fire Protection Backflow Preventor Valve reliable water supply providing superior mechanical durability and

providing superior mechanical durability and resistance to corrosion under high-pressure fire system conditions

ensuring adherence to the strictest fire protection and plumbing codes

Clear Visual Indicator: Equipped with a prominently displayed status window that shows “SHUT” when the valve is closed

Certified Safety: UL Listed and FM Approved

it reduces maintenance intervals and ensures consistent fire safety performance

4" Double Check Assembly OSY Valve Fire Protection Backflow Preventor Valve reliable water supply providing superior mechanical durability andThe 4" Double Check Assembly with OS&Y Valve from Ames Backflows is an essential backflow preventor engineered specifically for robust fire protection systems. This critical component ensures a secure and compliant water supply by effectively preventing backflow contamination, making it ideal for both new installations and upgrades in commercial and residential properties. Durable Construction: Crafted from high grade materials, this assembly is built