Pipe of a blowing machine

A pipe for the transport of a loose-fill insulation product for a machine for blowing the insulating product, the pipe extending along a longitudinal main elongation direction and comprising at least one cylindrical wall which delimits a space configured for a circulation at least of the loose-fill insulating product, the cylindrical wall comprising at least a first end portion and a second end portion that are opposite ends from one another along the longitudinal direction, wherein, in the pipe, the cylindrical wall comprises a plurality of sections between its first end portion and its second end portion, at least two of the sections each comprising at least one evacuation orifice so as to form at least two perforated sections, the pipe comprising at least two shutoff devices that are movable in translation along the longitudinal direction about the cylindrical wall, each of the shutoff devices being able to cover specifically one of the perforated sections.