kees wrote: ↑Tue Mar 31, 2020 10:05 am
I doubt this is brake fluid proof.
Just checked that. The core is nitrile rubber, which is specifically not recommended for brake fluid.
I have used Kunifer pipe before, and it looks quite a bit more like galvanised pipe than copper. I could try dusting it slightly with silver spray paint before fitting. I might use that in a larger size for the fuel pipe as I would like to flare the ends.
The next question, is have people tried stainless pipe fittings and bleed nipples? Are they easier to get out that the steel ones? Do they snap off less often? What about brass bleed nipples? I don't usually snap fittings off! Many cars I work on have snapped off ones. A rear calliper on a Mk3 springs to mind.
My TVR had factory fitted Kunifer brake pipes and brass fittings. I don't remember if the bleed nipples were brass, but I never had issues with the fittings. However I would prefer silver coloured fittings as they look more original, so if stainless are OK I would refer those.
I recently had a bad experience with some stainless coachbolts bought from a Swiss DIY shop. They were poor quality stainless and sheared when undone. Less than perfect machining, plus I am learning that cost aside, stainless is not always the best material choice.