[QUOTE=leskwvo]
Originally Posted by willbd
I already have check valves on both my WVO and diesel supply’s. Not sure what you mean by having a check valve on the returns. My WVO return just goes back to the top of the tank. No real way for it to draw fuel up unless the tank was completely full.
On Diesel return lines the fuel goes to the bottom of the tank. If you were to judt drop the Diesel fuel back in the tank it would cause foaming and when you were low on fuel you could draw air into you fuel system. The only diferance between the return line and pickup life is the size(for a stock tank). You WVO is not in a stock Ford fuel tank like mine. I am running WVO in my front stock tank.
If you are not using a dip tube on you return line in your WVO tank and wanted to run a looped fuel system you will need ot install a check vale in you WVO retun near the tank.