Gravity Feed Tank

[collegekid]

Im fixing to have a gravity feed fuel tank built for my truck, I know that I need to have a nipple at the top for my vent tube, and I will have one for my bypass return from my regulator, my question is, do I need a thrid one for the stock fuel return, or will it be fine leaving it plugged into the stock fuel tank?

[ahale2772]

combine the returns from the stock IP return and your regulator, dump it into whatever tank your gona use

[collegekid]

okay, I'll prolly convert the whole truck over to 3/8" fuel line then

[ellis93]

I've always just Teed into the filler neck on the factory tank. I use a ball valve on the auxiliary tank so when I didn't need it I turned it off. I used it to keep the trucks tank full by allowing it to free flow into the trucks tank. Whenever the fuel gauge started moving then I knew my tank in the bed was dry. Kept me from screwing with fuel lines to.

[collegekid]

Well my bypass return line is dumped into the filler neck, but leaks pretty good and Ive got some 1/4" patch line coming outta the tank, so the tank has to be dropped anyways, Im thinking I might as well just replace all the lines while im at it, My supply line is already 3/8" so I figured Id just make the rest match up.