Pump Power requirements : A Honda IC Engine powered 3 ” Centrifugal pump was used to draw water from the tank with a 3 ” suction pipe and pumped through a 2 ” inlet to the Flow Meter followed by a 2 ” delivery pipe to the Aeration head . Flow Rate : 30m3 / hr or 8.33L / sec , 200kPa at outlet . The 200kPa ( 20.4m H2O ) represents static head loss plus the frictional loss from piping and the aerator unit ( approx . 6.3m H2O for piping ). Hence Aerator water power required :