Quote Originally Posted by cffisher
Don't know if this is the answer your looking for but if you have ever flared steel brake lines with out double flaring they split. Why ????? All I know is when I started working on cars back with Fred and Barny I was told double flare so I do and I don't get leaks. I have done repairs on brake systems where someone used copper tubing inplace of steel with compresion fittings. There is probably a writen rule somewhere but I don't have a copy of it either.
copper tubing used as brake line is illegal, and if it's found used in such a way on your car during a safty inspection by the police, the police can condem it right there on the spot, and you have to remove the vehicle from the street, and find another way home, not to mention fix it and then have a registered inspection station sign off on it, so they can clear the fix it tickit.