There is probably a real good reason why aluminum isn't used for brake lines.
Two guesses, it corrodes faster than steel and you can not double flare it.
You said aluminum and unions, if your suggesting compression fittings, you'll regret that choice, compression won't take the pressures.
Have someone make the lines for you.
Or, in Canada, we can buy lengths of pipe with fittings and flared, in multiple lengths for universal purposes. You must have parts stores that sell universal lengths.
Two guesses, it corrodes faster than steel and you can not double flare it.
You said aluminum and unions, if your suggesting compression fittings, you'll regret that choice, compression won't take the pressures.
Have someone make the lines for you.
Or, in Canada, we can buy lengths of pipe with fittings and flared, in multiple lengths for universal purposes. You must have parts stores that sell universal lengths.
