I plan to have a flush mounted sump fuel drain exiting under the belly (.032 alum skin). The drain line will be a -4 size. Could someone guide me in going from a fitting like these..
http://www.aircraftspruce.com/catalog/appages/safairflush.php
..to a bulkhead fitting [to fix to the belly sheeting] then ends up mating with a -4 tube?
http://www.aircraftspruce.com/catalog/appages/safairflush.php
..to a bulkhead fitting [to fix to the belly sheeting] then ends up mating with a -4 tube?