The Chaipattana Ventury Aerator Model RX-4 is an air-fill apparatus working with a dip-type pump to suck air and water in to the end of a narrow pipe at the surface. This oxygen is taken into the pipe and dispersed  in deep waters where it dissolves. 

     This machine enables oxygen ventilation of 0.55 kilogram/horsepower/hour. It is installed at the Royal Irrigation Department's premises at Pakkret.