Product Description Rain Bird 16A-FDV Automatic Filtered Drain Valve Rain Bird 16A-FDV is used to automatically drain lines whenever pressure drops below a certain level. These are very useful in automatically draining down irrigation pipe work and prevent any frost damage. Can operate with pressure of up to 8.5 bar. Male 1/2″ Thread Automatic drain valves remove water from the system every time it is shut off. No manual intervention should be required. Check for excessive puddling on the soil surface should one of the drains become stuck open during sprinkler operation. Features The 16A-FDV is installed vertically or horizontally at low points in the system Specifications 1/2 (15/21) male threaded inlet Average opening pressure when installed vertically: 0.2 bar Average closing pressure when installed vertically: 0.4 bar Pressure: up to 8.5 bar Maximum flow rate before sealing: 0.23 m3/h Dimensions Diameter: 3.5cm Length: 2.5cm Click for Product Brochure