Water Handling Equipment Guide - National Wildfire Coordinating ...

WATER DELIVERY COMPONENTS AND ACCESSORIES
Nozzles
4. Nozzle tips
Since nozzle tips are comparatively small (in
size), w-inch GHT has been adopted for the
base thread. The USDA Forest Service
maintains Specification 5100-244 on straight
stream and spray tips. This specification lists
five different diameter straight stream tips and
eight different flows (gal/min) in spray tips.
The bore diameter is identified on the outlet
flange of the straight stream tips, and the flow
(gal/min) is stamped on the body of the spray
tips. The spray tips are designed to withstand
a pressure of 600 psi. Straight stream tips are
designed to withstand a pressure of 200 psi.
Materials and construction are detailed in
Forest Service Specification 5100-244.
a. Straight stream
Straight stream tips are designed and
inspected to produce the following
performance:
Tip Min. Min. Max.
size stream Flow rate Flow rate
(inch) @ 100 psi @ 100 psi @ 100 psi
(feet)* (gal/min) (gal/min)
8 29 4.2 5.2
x 34 9.4 11.6
4 40 16.8 20.6
c 41 25.3 32.1
a 41 37.9 46.3
*
Measured 36 inches above the ground, and to the
center of the area where the stream strikes the
ground.
Available from GSA:
x inch
NSN 4210-00-203-3855
4 inch
NSN 4210-00-177-6135
a inch
NSN 4210-00-203-3845
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