As above, whats the difference between the two? Sorry if it seems like a simple question

Do you mean Kunifer? It's a copper/nickel alloy, stronger than pure copper I believe. Google 'kunifer' and you'll get lots of discussion.

Kunifer is harder to get straight and bend but personal preference is kunifer!

Kunifer is better I think, I have seen copper used before because it is softer & easier to bend etc. I have also seen it deform to the point of closing the end off when overtightened! Dennis

Copper is prone to work hardening and cracking with vibration.
Kunifer is recommended for brake lines.

kunifer is also far more corrosion resistant, basically its a copper knickel alloy, we used to use tons of the stuff (or a variant of) in sea water heat exchangers in the middle east so if its good enough for sea water it should stand up to a battering underneath your car.

Cheers gents, sorry for the spellnting mistake

kunifer is very easy to work with, some of the "Kunifer" sold might be cu-ni-fe allloy but it isn't the genuine stuff.

Genuine Kunifer has" Kunfier" printed continuously along the outside of pipe.

The kunifer i've used was actually easier to manipulate than the ordinary copper stuff i used for templates, It resisted flattening at the bends much better.

Kunifer 10 is copper, 10% nickel and iron alloyed. It's not much dearer, is easy to bend and doesn't form verdigris and go green like copper.

[Edited on 3/4/10 by Peteff]

Kunifer - a name made up from the chemical symbols Cu, Ni & Fe - Copper (Cu), Nickel (Ni), Iron (Fe).

Today's trivial factoid...

You going for solid line over the flexy hoses then?

Yep, can't afford to run all braided and no real point!