You want high pressure 7mm x 3 fuel injection hose.

I used 5/16 when I replaced my fuel filter, but only out of
convenience since I had some handy.  If I were going to re-plumb the
whole system I'd use the proper metric line.

Get good quality too -- I've had cheap fuel hose crack and start
leaking after only a couple of years.

And use good clamps.

Allan
--
1991 Vanagon GL

Edward Duntz <eduntz@HOTMAIL.COM> writes:

> I'm going to replace my fuel lines in my '85 Vanagon Westfalia soon,
> and I've seen mention of both 7mm and 8mm lines to do the
> job. Van-Cafe says that 7mm were original but they sell 8mm.
>
> What are people using? 5/16 line is closer to 8mm, and I guess people
> are using that, too.
>
> Thanks, Ed in CT