Watts by Dixon® Regulator, Relieving Standard, series: R119, 1/2 in NPT Port, 150 scfm, 2 to 125 psig Pressure, 40 to 120°F, Zinc Body. Watts by Dixon® R119-04CG Relieving Standard Regulator with GC230 Gauge, 1/2 in NPT, 150 scfm, 2 to 125 psig Pressure