102 series utilizes a durable ABS plastic housing and a stainless steel adjustment screw (1/2 IPS connection). Note: Diameter of coverage is based on head mounted 6 inches (15cm) above grade. Operating Range · Flow: .25 - 1.5 gpm 0,06 - 0,34 m3/h · Spacing: 1 - 3 ft. 0,3 - 0,9 m · Pressure: 15 - 90 psi 1,0 - 6,0 bar Flow listed with full open performance.