Looking for your law I came on other stuff. This quote is about right:
Quote:
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Compression fittings are not designed to hold the kinds of pressures that are seen in an automotive brake system. A compression fitting will handle 300-500 psi just fine but a modern brake system can have pressures just in normal stopping of 1200 psi. Under a panic stop that can double. There is a reason flared tubing is used in automotive applications.... ITS CALLED SAFETY !!!
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also they are usually made of copper, which will work harden from vibration and fail. Here is what GM says about copper lines:
There are steel ones that are actually probably ok if the line being repaired isn't rusty. but of course it broke for a reason.
A piece of steel brake line is probably cheaper than a compression fitting.
And making a decent flare isn't that hard. Even I can do it!
I never saw NJ but it appears it is illegal to use them in other states.