Main fuel pipe to Accumulator broken - repair?????

One issue I will have to resolve is that the main fuel supply pipe from the accumulator flexi pipe split about 2 inches from the flexi union as I tried to undo the union.  I have ordered a new accumulator flexi pipe.  The rest of the main supply pipe to the filter is in great condition and I am loathed to replace the whole length - it is also a major job from what I have read.

I am investigating an option to extend the pipe.  A company is happy to provide a short length of cunifer pipe with a flared end and a 14MM x 1.5MM MALE PIPE NUT to attach to the accumulator flexi pipe.  I can then try and use a 5/16 (8mm) inline coupling on to join it to the existing pipe.

Has anyone done anything similar successfully???

What that has come up in discussions with the "well known copper brake pipe manufacturer" is this following qoute from them:

 "we are unable to supply a DIN flare on 8mm pipe. We have been supplying the fuel pipes for the MK1 Golf GTi with an SAE flare to match the SAE seat on the fittings for many years and, until now, we have not been advised that it should be DIN. If you still wish to go ahead with the order, the flares would have to be SAE as our fittings are only available with an SAE seat."

In reply I stated that the Golf uses a DIN flare and included photos.  Their reply:

"It does appear to be a DIN flare but we can use an OP1 single flare to create a similar flare to use with our fitting. The important thing is that the seat of  the back of the flare has to match the seat of the fitting on the pipe, not the part that it is going into. The copper nickel pipe is malleable so it will crush to form a seal which is why the SAE flare works with our fittings. We have not been made aware of any problems using the SAE flare with our fitting and we supply a lot of these GTi fuel pipes so there is no reason to believe that it will not work safely."


So they suggest using a male fitting with an SAE flare seat mated to their SAE fitting will successfully join with a DIN female fitting on the new accumulator pipe.

Anyone done this??  Thoughts appreciated

If they are the same as brake fittings one is radiused and one diagonal/straight (think DIN is straight?)  However with copper/cunifer being that soft, the diameter that small and the fuel pressure relatively low it will mate up perfectly to anything when tighten up???

PS when I got my GTI, it had been fixed (bodged) with rubber fuel hose and cable ties replacing holed bits of the original steel fuel line under the car. Car ran ok and didn't appear to leak….

I used a few compression joints on my Audi 80 cab 20v as that had a few issues on the pipe ends, worked a treat.