Abstract: A gaseous fuel delivery system includes a regulator valve having an inlet adapted to be connected with a high pressure source of a gaseous fuel such that the regulator valve lowers the pressure of the gaseous fuel from the high pressure source. A control valve has an inlet connected to the outlet of the regulator valve, and wherein the control valve is operable to control the flow of fluid between the inlet and outlet of the control valve. A cut off valve has an inlet connected to the outlet of the control valve, and wherein the cut off valve is operable between a first state, wherein flow of fuel is permitted to flow between the inlet and an outlet of the cut off valve, and a second state, wherein the flow of fuel is prevented from flowing between the inlet and the outlet of the cut off valve.