Rain Bird Spraynalysis Pressure Test

Date published: May, 2012

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HOW THE FLOW TEST WORKS

High water pressure wastes water—because as pressure increases, so does flow rate. To test this effect, we ramped up the water pressure to 75 psi for Rain Bird PRS sprays and competitive non-PRS sprays. We watched the flow rate of each spray to see how increased pressure affected it.

HOW THE PRESSURE DROP TEST WORKS

Common on many commercial sites, pressure fluctuations can cause some PRS sprays to over or undershoot their intended target. As a result, you could be putting down too much water—or not enough. For the pressure drop test, we raised inlet pressure to 100 psi then dropped it to 50. We looked at the effect on outlet pressure and measured the distance of each spray’s throw.