Inspection of District Regulator Stations and over pressure protection devices are essential in complying with Federal and State Regulations. In order to understand the functions of a District Regulator, we must start with the City Gate Station. Some pipeline people call City Gates, Town Border Stations. City Gate Stations are where distribution companies purchase natural gas from the pipeline. The gas is measured and odorized here. Measuring devices are usually installed by pipeline companies. Odorizers are installed by distribution companies. Pipeline companies bring the gas from the well head and it goes into a gathering system. The gathering system is where a pipeline transports gas from a current production facility to a transmission line or main. From the gathering system, it goes to a compressor or dehydration regulating station. At this point, the pressure is lower or control to the MAOP of the pipeline system. The gas leaves the compressor station with xx amount of gas pressure. This gas goes to the City Gate Station, where the pipeline lowers their pressure to operating pressure of the line (MAOP) inside the City Gate Station