The Star Mfg 2V-80501-04 Pressure Regulator Natural Gas 3/4" is used to control the flow of natural gas by decreasing the high inlet pressure to a steady, lower outlet pressure that could be used in downstream equipment. It automatically adjusts to changes in available pressure to keep the supply of gas constant. It is designed to be installed in-line and fits well into a natural gas ... https://partsfe.com/2v-80501-04-lang-pressure-regulator-34-nat