I would like to run copper fuel lines under my car secured by p clips.

I've looked and am I right in thinking its IVA safe and legit.

Like to double check before I start routing them

Mine we copper but down the tunnel and no issues during IVA. I would be careful putting them under the car as it could be an issue if three is a chance of them grounding out on speed humps etc.

Worth paying a little bit extra for kunifer (copper nickel), don't see any problems so long as the p clips are spaced close enough together, but I have not read the iva manual or gone through iva, best check with the manual.

Think iva manual just says they have to be secure and leak free.
Metal pipes meet all requirements, plastic lines and rubber hose have to be marked with correct standards for fuel.
Theres a link below to download the iva manual! Just to help keep yourself right. I'm putting my copper lines (bought from a chandlery shop as boat fuel line) inside a clear pcv braided hose. Protection from abrasion of grit, rocks etc, stops it vibrating as much, and if any cracks occur, helps stop fuel spraying on electrics/exhaust since all of mine are in the tunnel

Good point blakep82, I am going to be doing my anglia brake and fuel lines in the next couple of weeks and will be covering the kunifer lines in heatshrink to give a bit of protection, mkes them look nice as well. I am using 3/16 for brakes and 5/16 for fuel.

I already have one copper fuel line (added as a return alongside the existing plastic supply). However, google copper and ethanol in petrol before going any further. The percentage of ethanol that can be added to petrol (without stating it on the pump) is going to/may have already increased and there are suggestions of it attacking copper and brass.

[Edited on 14/3/15 by SteveWalker]

Think its best to just flare the end with my brake flare tool to give it some grip

Kunifer is made for the job , the material is stronger than the thin gauge copper pipe and doesn't kink so easily although it's worth using a pipe bender

I was always told not to use pure copper for fuel lines as it's prone to work hardening and cracking through vibrations, and to always go with copper/nickel ones instead

Yet, I've used 5/16 Kunifer pipe down the tunnel of mine. As stated far better then using pure copper.


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[Edited on 20/3/15 by tims31]