an adjustable nozzle comprising a nozzle body with an inlet , an outlet and a flow chamber having a smooth bore extending between the inlet and the outlet . an elastic water impervious material is in fluid communication with the inlet and is tapered and is able to expand due to its elasticity . an adjustable non - rusting member connected to the nozzle body expands or constricts to either increase or decrease the inner diameter of the nozzle body to adjust the flow rate through the nozzle .