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Designing Sprinklers to
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| Purple Nozzle | 3/32" | 1.6 gpm @40 psi |
| Orange Nozzle | 7/64" | 2.2 gpm @40 psi |
| Green Nozzle | 1/8" | 2.9 gpm @40 psi |
| Blue Nozzle | 9/64" | 3.7 gpm @40 psi |
| Black Nozzle | 5/32" | 4.4 gpm @40 psi |
Using our above example of 5.25 acres and a total allowable
of 44.5 gpm, you can run 28 heads using purple nozzles (44.5/1.6); 20
heads using orange nozzles (44.5/2.2); 15 heads using green nozzles
(44.5/2.9); 12 heads using blue nozzles (44.5/3.7); and, you are
limited to 10 heads using black nozzles (44.5/4.4).
The
majority of metal impact sprinklers run 1/8" nozzles, although the
nozzle size can be changed to a smaller size allowing you to run more
heads. To determine your nozzle size you can use drill bits inserted in
the nozzle to determine the size. Note that over time and with the
abrasive nature of our water, the nozzle size will increase.
Those of you who are using double heads, i.e. two nozzles per
sprinkler head, are really limiting yourselves to a minimal number of
heads that you can run.
We are aware of several water users who
are using double heads with an orange and black nozzle. Total flow with
this configuration is 6.6 gpm. If you own 5.25 acres then you are
limited to running 7 heads. Using double heads provides you with no
advantage; you are limiting your flow and pressure, and the area that
you can irrigate while staying within your water allocation.
For
further information contact: Stu Skidmore, President; Mike Stenberg, Vice President;
Gary Carlton, Secretary; or, Tracy Oestreich, Trustee;
We welcome your comments on the website.