cheers mate, ordered 15 metres this morning from a guy we use at work, hopefully wont have to pay for it ;o)
Get thirty metres for me on the same terms!
If your leak-off pipes are good, it's almost a certainty there's air getting IN as What'shisname says, on the suction side, which is between the fuel in the tank and the lift pump.
A new run of plastic pipe should fix it unless the leak is INSIDE the tank on the pick-up tube.
CharlesY