Fuel Flush Valve, 1/8" Taper Pipe Fitting, for Maule M-5 or Aircraft with 1/8” Taper Pipe
F391 Fuel Drain Valves are original equipment on many aircraft. These valves protrude from the surface of the aircraft less than most other drain valves, and for this reason are referred to as F391 Flush Valves. F391 Valves can be opened only with a special rod. A sampling cup with rod attached permits draining fuel into the cup to check octane color as well as for water and other contaminants.
F391-14: Cessna T-50, Piper PA-11, PA-12, PA-18, PA-20, PA-22, or Aircraft With 1/4” Taper Pipe Fitting