Abstract: A delivery lance which includes a pistol handgrip formed in one piece with a delivery tube, at the base of which is provided a valve seat for a valve which opens and closes the lance. The pistol handgrip is internally hollow and closed by a side cover which, together with the handgrip, provides access to the articulation, support and guide elements for a pressurized water feed tube, for a valve body telescopically mounted at the tube end, for an operating lever or trigger causing the valve body to undergo translational movements against a spring, and for a locking device for the lance operating lever or trigger.