4" Double Check Assembly OSY Valve Fire Protection Backflow Preventor Valve reliable water supply Certified Safety: UL Listed and

Certified Safety: UL Listed and FM Approved

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

Supervised Switch: Integrated monitoring switch continuously signals valve status for immediate alerting of faults or irregularities

Precise Moisture Monitoring: Designed to accurately detect the presence of moisture in compressed air

4" Double Check Assembly OSY Valve Fire Protection Backflow Preventor Valve reliable water supply Certified Safety: UL Listed 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