Johnson Pump manufactures self-priming, single-stage centrifugal pumps suitable for low viscosity, clean liquids. Depending on model the pumps feature a maximum delivery head or 100 m, 80 m, or 60 m; and a maximum pressure of 8000kPa, 1000 kPa or 900 kPa.  All self-priming pump models feature a maximum speed of 3,600 rpm.