4
4.1.3.
Fully insert needle inside nozzle to accurately measure
pressure supply to nozzle. Note: Air Induction nozzles will
require inserting the needle inside the primary orifice fully for
accurate pressure readings. This may require use of the extra
long needle. The bent needle is designed for use with irrigation
nozzles. (see next page for needle selection)
4.1.4.
Read the pressure from the gauge. It may take a second
or two to reach full pressure due to the small diameter of the
needle.
5
4.2 Needle Selection
Standard Needle
Extra Long Needle
Bent Needle for Irrigation Pitot Tube Method
Sealing Needle for Cone Nozzles
