by means of couplings 8 on the extremities of the high pressure hose 6 the tubes 7 are not coupled directly to each other since they are attached at their extremities to the high pressure hoses 6 in the embodiment according to fig2 the relatively stiff tube 7 surrounds the supple hose 6 the mechanical connection between the extremities of the hose 6 and the tube 7 are each formed by a coupling sleeve 9 which on the one hand hooks over an inwardly protruding collar of the tube 7 and on the other hand hooks over the farthest edge of the actual hose 6 as represented in fig2 the high pressure liquid flows through the high pressure hose 6 the annular space between the hose 6 and the tube 7 remains empty in this annular space electric wires can be installed for working or controlling electric apparatus which are arranged in the directable nozzle 3 the embodiment of the high pressure pipe according to fig3 differs from the embodiment according to fig2 through the fact that the relatively stiff tube 7 is located within the high pressure hose 6 the mechanical coupling between the extremities of the high pressure hose 6 and the tube 7 is formed by radial connections 10 between the tube 7 and the couplings 8 so that liquid under pressure can flow through the high pressure pipe 1 around the tube.