From the supply pumps the fuel passes to a set of backflushing filters (25 micron). The pods contain the filter elements. When the filters start to clog up, a differential pressure sensor initiates a backflushing routine so that the filters clean themselves. The backflushing oil with the sediment from the filters drains to the fuel oil drain tank from which it can be recovered and purified.

The filter can be taken off line for cleaning, when a mesh type filter is put into operation.