Single or double flair on brake lines

[98whitegpgt]

There was a hole in one of the rear brake lines on my 92 buick. Cut out this bad section and replaced it with new line. I got everything all connected up (using single flair's), go press the brake and 2/3's of the joints had drips.

Should i use double flairs? Any other ideas. I used teflon tape and everything was tight.

[Russ Jerome]

No tape, must be double flared for the extremely high pressure.

[HITMAN]

No tape, must be double flared for the extremely high pressure.

Ditto on this advise. No tape, and no Teflon sealing compound, either.

[Moparjim]

Single flare will work - everyone's right though definitely no tape. Be sure the flare isn't splitting as well when you flare the tube I have had them split from the stretching. Overtightening can make em leak too believe it or not - snug is good, if they leak you can back em off and "reseat" them but they shouldn't have to be cranked ape-tight.

[Berettaspeed]

no single flare.. double flare only....single can crack and split under hard and sudden braking.. its only 10 sec. longer to do

[Russ Jerome]

If your front brakes are nearly 1000psi the rear bias is
upwards of 650-750psi........thats during "normal" driving
in a heavy car.