flow and return pipe

[deks]

So numpty question here. I am replacing the fuel pipes on my IE HPE i took a pic of the pipes above the fuel filter of which one is the feed and the other is the return to the tank. However I didnt check the image and now discovered its blurred. So my next solution is to go to the engine and and remove either the feed or return pipe and blow down it and see which is which. The issue is I am unsure which is flow and which is return on the fuel rail. I have one pipe that feeds direct into the fuel rail at the front of the engine and another which looks to connect to some sort of mechanical valve at the rear of the engine.  Both pipes are same size and so was the fuel pipe that was removed

TIA

[Neil-yaj396]

The fuel filter will be in the send line, unless you removed that too?

[SanRemo78]

I think Steve might need to know which is the pick up pipe on the tank itself? I would expect it to be bigger than the return one though.