Fortrans has developed a way to produce low-cost deaerated water by integrating its patented Dif-Jet gas injector into batch production of deaerated water in storage tanks. The device is used to efficiently inject and mix nitrogen gas into a pressurized water pipe. Then the nitrogen is discharged into and circulated in a tank of water. The nitrogen will force the oxygen out of the water without requiring a vacuum pump, heat or another device; the oxygen is vented out the top of the tank automatically.