5mm ID is the correct hose.  Never have had a problem with it.  I replaced
mine in '97 on the Westy and they're still supple, no cracks, etc.  VW Part
# N 020 355 1, same as the fuel hose used on carbed Bugs & Buses.

You could prolly get away with 7mm ID, but be sure the clamps are tight to
prevent leakage.

My nickel's worth....YMMV
--
Jim Thompson
84 GL 1.9 "Gloria"
84 Westfalia 2.1 "Ole Putt"
72 411 Station Wagon "Pug"
75 914 1.8 "Nancy"
Full Timing Since March 1999
oldvolkshome@gmail.com
http://www.oldvolkshome.com
***********************************
On Thu, Jul 29, 2010 at 11:23 AM, neil n <musomuso@gmail.com> wrote:

> Hi all.
>
> Am short of time. In the middle of minor hose re-do at tank stopping
> minor seeping at 1 or 2 hose connections.
>
> '81 Vanagon.
>
> 5mm ID low pressure braided currently installed. Is this the correct
> size? End was cracked pretty bad. Only 2 YO. Cable straps were used.
>
> I have 7mm hose on hand if thats a better fit. (though it slips very
> easily over nipples)
>
> Thanks!
>
> Neil.
>
> --
> Neil Nicholson '81 VanaJetta 2.0 "Jaco"
>
> http://tubaneil.googlepages.com/
>
>
> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
>