Date of this Version



© 1988, The Board of Regents of the University of Nebraska on behalf of the University of Nebraska–Lincoln Extension. All rights reserved.


Several factors contribute to the need for sprinkler flow rate regulators. This NebGuide discusses them.

Many center pivot irrigation systems operate on undulating terrain. Systems operated on undulating terrain experience large pressure differences in the pivot pipeline. Since water distributed by each sprinkler is determined by the pressure in the pipeline, water applied by these systems can be non-uniform.

Pressure regulating devices that equalize the flow of water from individual sprinklers have become more common since uniform water application may save water and increase overall crop production. When installing a sprinkler package on a new system or replacing sprinklers on an existing system, it is important to evaluate the impact of field elevation changes on sprinkler flow rate.