I'm wanting to connect into some existing brake line on a car. Seems like the cleanest way would be to use these female tube nuts - https://brakequip.com/products/hardware/female-tube-nuts/
Maybe I'm dumb, but I'm not sure how to flare a female tube nut though. Do you just flare it the opposite of what the existing line is (ie if the existing line is a double flare, flare the female line like a DIN flare, and vice versa)? I know for flaring AN fittings, you need a collet also? Are those needed for 45* female tube nuts?
I might be overthinking it, but I don't know any other way to do it?
12GS said:
I might be overthinking it, but I don't know any other way to do it?
I think the usual way to do it is to get a female/female brake line union.
The technique required here is a male-male fitting in the Weatherhead rack at a good FLAPS. Or perhaps female-female or male-female. All are a couple bucks each.
In reply to codrus (Forum Supporter) :
I probably should have included why I didn't want to use unions. Unions introduce more leak points. Not a big deal usually, but in this case, I'm connecting to an M12 tube nut on a 3/16" line. Every M12 union is designed for 1/4" line, so they don't seat very well and are hard to get to seal properly.
In the past I have used unions, but I thought this would be a less risky way of doing it. There must be a way to flare these, since they sell them. There's just no instructions that I can find.
Turner is correct.
it sounds like what you're proposing would have one tube flare trying to seal against another tube flare.
i have never, yes I said never, seen this done.
In reply to AngryCorvair (Forum Supporter) :
Can you translate what Turner said? Cause it went right over my head ...
I hadn't ever seen it or thought of it until I saw this picture from Vorshlags install of a MK60 in their corvette last night
In reply to 12GS :
Weatherhead is a brand name, they make all kinds of adapters, fittings, tube nuts, etc.
FLAPS is berkeleying Local Auto Parts Store
Has this Vorshlag build been bled and stomp tested yet? Because I'm trying to imagine a world where smashing one tube flare into another tube flare produces a robust leak-free joint, and my imagination just can't get there from here. I'm guessing one side is bubble and the other side is inverted. Maybe it'll work because they're using NiCopp, but I wouldn't put my family in anything plumbed that way.
In reply to AngryCorvair (Forum Supporter) :
I have seen some small free floating until you tighten it up double cones installed to accomplish this with two double flares. I can't remember what it was on, but it was not high pressure brakes. I kept having the damn cones seat off center and leak, or restrict. Not often something is so frustrating I block the details!
Oh, and I picked up the FLAPS acronym on this forum....
I hate extra leak points just as much as the next guy but I think the assurance of bolting a flare fitting down to a solid union over just another flared line is worth it.
If you're doing the flaring, you can change both tube nut sizes to a more common m10 tube nut that'll fit the 3/16" line.
iansane said:
I hate extra leak points just as much as the next guy but I think the assurance of bolting a flare fitting down to a solid union over just another flared line is worth it.
If you're doing the flaring, you can change both tube nut sizes to a more common m10 tube nut that'll fit the 3/16" line.
Literally all of that.
37 degree female tube nuts are common place if you can flare for -3
I'll just continue to use unions. This was just a thought to avoid them if it was possible. Guess not.
That picture was after the car had been running the MK60 on track for a atleast 3 events. Has been tracked for couple years like that, and the car has since been sold. So someone might want to check out their car and rethink the brake line plumbing ....
