Diesel fuel purifier

A purification chamber (1) encapsulated by an external body (2) has a barrier with conical and cylindrical portions surrounded by a wire filter (7). Fuel flows from an inlet (5) through a pipe (6) to the conical portion, and to an outlet (8) through a final filter (22) secured to the outlet. The upper portion of the diesel fuel purifier has a relief valve (9). The lower portion of the diesel fuel purifier has a heating element (10) and a water cock (11) connected to sound and light indicator (12) at cabin dash board, and the bottom has a drain valve (13). An independent claim is also included for a process of purifying diesel fuel using purifier.