WATTS® Air Gap, For Use With: Model 909/LF909 4 to 6 in Reduced Pressure Zone Assemblies, Model 909RPDA 4 to 10 in Reduced Pressure Detector Assemblies, Model 909/LF909M1 8 to 10 in Reduced Pressure Zone Assemblies, 9-5/8 in H, Import

This air gap for reduced pressure zone assembly, 6 to 4 IN series 909 and 8 to 10 IN series 909M1, provides an unobstructed, physical separation between the discharge end of a potable water supply line and an open receiving vessel. The installation of an air gap and drain line are recommended on reduced pressure zone assemblies. It can be installed vertically or horizontally (vent elbow required for vertical installation).