Quick fuel line question.

[GeneralGrant]

Which line under the hood is fuel feed?

 

[Zero Signal]

It should be the larger one, but I can't remember if they are the same size or not. I just changed my fueld pump the other day and I know the smaller one at the pump is the return, but they may change before the engine bay. You can tell instantly if you have a pressure tester, just squeeze the hoses shut for a split second and the one that makes the pressure jump is the return.