Compression Fittings On Brake Lines ?

They should be flared brake line fittings. I would not trust compression fittings to hold and not leak.

In NYS this also applies, I have failed several vehicles for compression unions, double flared is required and recommended.

Some compression fittings probably are rated for the pressures experienced by brake tubing, but in general it is considered poor practice to use compression fittings on brake tubing. Additionally, most state inspectors will automatically fail a car if it has compression fittings on the brake tubing, and your "mechanic" should have known that - pretty much universally, the only fittings acceptable are double flares (or similar ISO "bubble" flares) or bolted fittings with copper washers (i.e. banjo fittings or threaded ends, usually used on rubber hoses.) Unfortunately for you, probably the only way to get your sticker is to have the repairs redone by someone who knows how to use a double flaring tool.

I don't think that i need to add that you probably shouldn't go back to that mechanic again, either.

The good news is that flaring steel brake tubing is NOT rocket science

- I could hook you up.

nate

Compression fittings are ok for water plumbing,but for steel brake lines,NO. I would not trust them at all. cuhulin

Having recently done some stainless hard line with swagelock compression fittings for 4,000 psi high pressure air service I can confirm that there are indeed compression type fittings that are suitable.

Pete C.

That's interesting. Here in Virginia, I think that is legal for state inspection.

It's worth at least calling them and letting them know.

Compression fittings give me the willies. I'd replace them, whether or not the safety folks required it. But that's just me, and I tend to be paranoid about such things.

--scott

I have also worked with Swagelock type fitting for years, and have great confidence in them. But the question is, are they acceptable by the inspection authorities in all the states??

We should have (or maybe DO have) an FAQ section for important issues like this that keep recurring. Does anybody know if we do, or how to start one if not?

I doubt they would be acceptable at first glance. If you provided the inspector a copy of the specs sheet for the Swagelock fittings they might agree they were acceptable and ok them. Of course the Swagelock fittings cost more than the already acceptable double flare connections, though they are easier to install with limited access.

Pete C.