Minimum Compressor Air Line Diameter

Nozzle No. Nozzle Orifice Size Minimum Air Line ID
No. 3 3/16″ (5.0mm) 1″ (25.0mm)
No. 4 1/4″ (6.5mm) 1″ (25.0mm)
No. 5 5/16″ (8.0mm) 1-1/4″ (32.0mm)
No. 6 3/8″ (9.5mm) 1-1/2″ (38.0mm)
No. 7 7/16″ (11.0mm) 2″ (50.0mm)
No. 8 1/2″ (12.5mm) 2″ (50.0mm)
No. 10 5/8″ (16.0mm) 2-1/2″ (64.0mm)
No. 12 3/4″ (19.0) 3″ (76.0mm)

Available Literature: