Protocols

Pressure-regulating Spray Heads

Pressure-regulating spray heads are designed for use in areas with high or fluctuating water pressure. These products include a built-in regulator that maintains a more constant pressure for optimal nozzle performance.
 
Typically for spray nozzles, 30 psi provides the best performance. For rotary nozzles the preferred operating pressure is 40-45 psi. Correct nozzle pressure helps the nozzles distribute the water more evenly and reduces water waste caused by excessive pressure.

SWAT Testing Protocol

Version 3.0 of the protocol was released in May 2012 and is the current testing protocol.
 
For questions about SWAT or pressure-regulating spray heads, contact the Irrigation Association (703.536.7080; swat@irrigation.org). Past versions of testing protocols can be found in the Archives.