Watts 909 AGK Air Gap (0881385)

Watts 909 AGK Air Gap (0881385) Watts 909 AGK Air Gap for Reduced Pressure Zone Backflow Preventers. Air gap provides the unobstructed, physical separation between the discharge end of a potable water supply line and an open receiving vessel. Series and Sizes: • 909 4"- 6" • 909 M1 8"- 10"