leaking brake valve

My first try with all my new lines I had the same results but the valve was leaking at the hex nut and out of the switch . I got a new valve and before I put it in I checked the hex nut and it was loose . I hooked up all the lines as Inline tubes told me had no line leaks but the hex nut adapter leaked all my lines are new from Inline Tubes I am going to have a talk with Inline tubes Monday Waco Demon