Abstract: A Gate valve is controlled in a Sewage Regulator by incorporating a Hydraulic System, a Programmable Logic Controller, and a Level or Depth Measuring device. By using this method, setpoint control can be utilized and the setpoint readily changed and verified. Also it is possible to display information and input setpoint changes via an operator interface without means of programming device. Communications to a Serial Printer can also be achieved by connecting to the Serial communications port of the PLC, this allows a hard copy of the information on alarms or other relevant data. Control of other external devices can also be achieved by suitably programing the PLC to manipulate the various outputs of the Contact Output Module to automatically control a Sampling Device or other such equipment which responds to a Contact closure, Pulsed Signal, or voltage output.