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Fuel Filtration Process

Get to know a little more about the fuel filtration process before Clean Fuels is on site. This will help you understand what we are doing and why.

Upon arrival on your site we set up our equipment as close to the tank as possible. The closer we can be to your tank the better so as to minimize the risk of accidents from excessive hoses and equipment. A suction hose is inserted through an access port at the top of your tank straight down to the bottom. We must have straight down access in order to guarantee our work.

The semi-flexible suction hose will draw up and remove the bulk of the contaminants which settle at the bottom of your tank so it does not get “stirred up” during the filtration process. This hose helps Clean Fuels Technicians reach areas of your tank that our competitors may miss.


clean fuels filtration process

Next we attach the suction hose to the filtration unit which is comprised of a water separator and a series of filters. These filters will remove any particles from 5/100 of a millimeter (5 microns) and up. To give you a better idea of how clean that is, typically when fuel comes from the refinery it has been cleaned down to 25 – 35 microns. At this point a biocide can be added to diesel fuels to instantly kill all bacteria and algae growing in your tank. The fuel is then returned to your tank under pressure to agitate any possible algae or debris clinging to the side walls of your tank. The fuel from your tank cycles through our filtration unit continuously until both the fuel and the tank test clean.

When filtration is complete you may be offered to have a fuel stabilizer added to your diesel fuel if you and the technician decide it is necessary. You can expect to see a before and after sample of your fuel while we are on site.