Light aircraft fuel system components Andair design and manufactured precision aircraft components - typically fuel system items such as: fuel pumps & filters, fuel selectors, duplex fuel selectors, gascolators, check valves, extensions, Andair design and manufactured precision aircraft components - typically fuel system items such as: fuel pumps & filters, fuel selectors, duplex fuel selectors, gascolators, check valves, extensions, accessories, oil/air separators, locking fuel caps, throttle quadrants - for use in amateur-built and certified aircraft.