Electrostatic dissipation needs in a fuel system
Flowing fuel can build a static charge, and so it is necessary for the fuel system components to be electrostatically dissipative. Components from the fuel rail, to the fuel lines, the sender unit at the tank, and especially the fuel filter are thus made from metal or conductive thermoplastics. Fuel systems are earthed, or grounded, at a number of points along the path from tank to engine, to prevent a build-up of the static charge.