Multi-way sliding valve comprising: - a body which extends along a central axis and through which passes a central bore that opens on either side of the body; and through which pass at least four main orifices (21, 22, 23, 24) that are arranged in pairs on either side of the central axis, each of the main orifices opening at one end onto the exterior of the body and at the other end onto the central bore, being opposite another of the main orifices; - a generally cylindrical core comprising two contractions (30, 31) of diameter that are spaced apart from one another by a distance corresponding to the axial separation between two main orifices (21, 22; 23, 24) of the body, the core having, passing through it, two channels (32, 33) of which one opens at one end onto one of the axial ends of the core and at the other end onto its radial periphery between the two contractions (30, 31), and of which the other opens at one end onto the other of the axial ends of the core and at the other end onto its radial periphery between one of the two contractions and the other of the axial ends of the core, in which valve the core is mounted at least so as to slide in the central bore of the body such that: • in a first sliding position, the main orifices facing one another are fluidically connected in pairs (21, 22; 23, 24) by means of one of the contractions (30, 31) while the two channels (32, 33) do not open into the main orifices; • in a second sliding position, the two channels (32, 33) each open into one of the two main orifices (22, 24) that are located on the same side of the central axis of the body while no two main orifices (21 to 24) are fluidically connected to one another. - a body which extends along a central axis and through which passes a central bore that opens on either side of the body; and through which pass at least four main orifices (21, 22, 23, 24) that are arranged in pairs on either side of the central axis, each of the main orifices opening at one end onto the exterior of the body and at the other end onto the central bore, being opposite another of the main orifices; - a generally cylindrical core comprising two contractions (30, 31) of diameter that are spaced apart from one another by a distance corresponding to the axial separation between two main orifices (21, 22; 23, 24) of the body, the core having, passing through it, two channels (32, 33) of which one opens at one end onto one of the axial ends of the core and at the other end onto its radial periphery between the two contractions (30, 31), and of which the other opens at one end onto the other of the axial ends of the core and at the other end onto its radial periphery between one of the two contractions and the other of the axial ends of the core, • in a first sliding position, the main orifices facing one another are fluidically connected in pairs (21, 22; 23, 24) by means of one of the contractions (30, 31) while the two channels (32, 33) do not open into the main orifices; • in a second sliding position, the two channels (32, 33) each open into one of the two main orifices (22, 24) that are located on the same side of the central axis of the body while no two main orifices (21 to 24) are fluidically connected to one another.