clear fuel pipe for fuel filter to fuel pump - diameter?

[discipleofsketch]

I want to replace the clear fuel pipe running from fuel filter to fuel pump on my diesel engine. Currently I have the original clear pipe from the 1.6 diesel, with a repair at one end (black pipe overlapped and clamped at the fuel pump end). Local VW specialist told me it was an "acceptable" repair, but I want to replace it along with the filter, as I spotted an air bubble in there.

So what internal diameter do I need, and where is a good place to buy? I want to stick with clear pipe to keep an eye on the bubbles.

[lloydy]

Have a search on Brickwerks, they do the whole pipe with the crimped ends and everything..
Actually found it for you
http://www.brickwerks.co.uk/index.php/f ... -pump.html" onclick="window.open(this.href);return false;

[discipleofsketch]

Cheers Lloydy, that also explains how the Filter end is supposed to attach!