im doing my LTs right now and took off my custom 1/4" copper plumbed tubing and my neighbor pulled up on my driveway and ran it over with his duramax 3500 silverado and flattened it, so i need 2 make a new one and had see someone do brake lines before. i was just wondering what size and what compression fittings they used on it. thanks

 

anyone???

 

AThats fine just use 3/16 if you want it to be the same as the standard purge line.
Dave