The coating unit for elongate components comprises a tank with molten metal and a coating chamber with inlet and outlet channels with an intake channel submerged into the tank with molten metal. Moreover, the coating chamber and the tank with molten metal are equipped with facilities for internal creation inside them above the heel reduced pressure and positive pressure respectively. To facilitate the operation and maintenance, as well as to ensure continuous operation of this unit without any stops for refilling the tank, to provide safety conditions while metal refilling into the tank with molten metal of this unit for coating of elongate components, the tank with molten metal and coating chamber are located in adjacent positions and jointed together with the inclined intake channel creating connecting vessels. Herewith, the tank with molten metal is equipped with supplying channel to load molten or solid metal through it, besides the supplying channel expands at the upper part entering the upper part of the tank with molten metal.