Tap for pressurized fluid

A tap for pressurised fluid, with or without an integrated pressure regulator, comprising a body (2) housing a fluid circuit (3) having an upstream end (4) intended to be connected to a pressurised fluid reservoir and a downstream end (5) intended to be connected to a user device, the circuit (3) comprising a valve (6) for controlling the flow rate in the circuit (3), the valve (6) being controlled by a lever (7) pivotally mounted on the body (2) of the tap (1) between a rest position in which the valve (6) is maintained in a first state corresponding to a first flow rate value in the circuit (3) and a second active position in which the lever (7) moves the valve (6) in a second state corresponding to a second flow rate value in the circuit (3), wherein the outer surface of the tap (1) comprises a groove (8) and wherein, in a first position, a first portion (17) of the lever (7) is housed in the groove (8) and does not protrude or protrudes slightly with respect to the outer surface of the tap (1), while a second portion (27) or the lever (7) protrudes outside the groove (7) and wherein, when the lever (7) exits the first position, the first portion exits the groove (8) and protrudes in relation to the outer surface of the body of the tap.