So, let me start off by saying that I know it's very ill advised to use a traditional compression style union in a brake line repair. It is not in question and not up for discussion.
What I'm after is, is it illegal by federal or maybe State of Iowa standards? I've done some searching on the web and found many references to it being shady, dangerous and also illegal, but no links pointing to a website saying as much. I have seen a few links to other states and a few federal standards governing heavy trucks stating that they'll fail inspection, but it's not quite what I'm after.
What I'm after is, is it illegal by federal or maybe State of Iowa standards? I've done some searching on the web and found many references to it being shady, dangerous and also illegal, but no links pointing to a website saying as much. I have seen a few links to other states and a few federal standards governing heavy trucks stating that they'll fail inspection, but it's not quite what I'm after.