I just know this thread is inviting controversy so be nice! I have two small leaks at compression fittings.


  • One is where the solid fuel line connects to the fuel shutoff valve at the center console. I've tried gently tightening fitting but, returning to the hanger after a few days, a drop of fuel was hanging off the lowest bend in the tubing and there is a persistent wet spot on the fabric below the fitting. Is it critical that the tubing be exactly in line with the fitting or do the spherical mating surfaces naturally allow a bit of misalignment? Do I just try another 1/8 of a turn or take off the tubing and look for some problem with the flare? Proper flaring angle tool was used. And, of course, there are no leaks forward of the firewall.
  • The second leak was revealed by a film of brake fluid and a single tear of fluid along the horizontal portion of the spring landing gear. This is either where a 90 degree fitting screws into the gear, or the compression fitting on the brake line. My kit came with nylon brake line, compression nuts with captured olives, but no line inserts. There is an old thread discussing these fittings and lack of inserts but I'm trusting that Kitfox sent what they are using in their factory builds, and the supplied components aren't the problem. I can try snugging the compression fittings but that won't help if the leak is where the 90 degree fitting screws into the gear.


Can I disconnect these compression fittings then reinstall? Or is that a cardinal sin with compression fittings and they must always be replaced?