The Netafim Wide Range Pressure Regulator is the only 1" regulator in the industry that is rated from 0.5 to 35 GPM. High strength ABS construction and stainless steel springs provide long-life and can be used in a variety of applications while the rolling diaphragm and sealed regulating chamber provide consistent, high quality performance in any irrigation system. Operating inlet pressure range: 30 to 150 PSI.