used as fuel within the apparatus 10 the level of glycol within the separator 34 is maintained by a level control means 36 which is in communication with an output flow valve 38 the glycol from the separator 34 flows through the output valve 38 by a line 40 through a venturi eductor 42 and then into a still column 44 the glycol flows downward within the still column 44 and into a reboiler 46 within the reboiler 46 the glycol is heated by means of a fire tube 48 above the boiling point of water approximately 400 u00b0 maximum for teg but below the temperature of thermal degradation of the glycol whereby the absorbed water is separated from the glycol and the water vapor is discharged through an exit not shown within the top portion of the still column 44 the fire tube 48 is provided with a gas supply by a line 50 from a fuel gas source not shown and the separator 34 fuel gas from the separator 34 passes through a gas back pressure valve 52 which is in communication with level means 36 within the separator 34 and which maintains the fuel gas and instrument gas supply at.