High volume flow rates / Variable Speed Processing:
The Tornado has a variable speed pump system. Simply turn the speed knob on the control panel to vary fuel flow rates from 1 to 15 gpm. At start-up it is best to run between 1-7 gpm. Once the gross contaminants have been removed the flow rate can be sped up to 15 gpm to allow for a powerful final flush.

Clean fuel depends on a clean tank
When a tank is contaminated, any new fuel that is added will become contaminated by existing sludge (micro-organisms, water, and sediment) settled on the tank bottom.
The Tornado completely cleans the fuel and the tank - simultaneously.