The JMP FV-1 Flush Fuel Vent System begins with the main threaded fitting. A 3/8” hole is drilled into the fuselage and the threaded fitting is secured with the 3/8” washer and panel nut. There are two sizes of fuel line choices for the vent line, either 3/16” or 1/8” ID. This fuel system vent line attaches the internal right angle fitting to the main fuel tank vent. If you are using the FV-6 Forward Facing Vent, or, “scoop”, time the two mount holes of the threaded fitting to point the “scoop” forward.