Ok, let me start over a bit just to make sure I am asking this the right way. We are hooking up a two tank system and want the fuel returns to each go back to the respective tank (D2 return to D2 tank and WVO return to WVO tank)

To supply the lift pump/IP, we are using a three port valve hooked up so the two different fuel types come into the valve, then depending on which way the valve is switched determines which fuel goes into the lift pump/IP.

My question is can I hook up the other 3 port valve in such a way that instead of two fuel inputs going to a single output, I can have a single input (return fuel line from the cigar hose) go to two outputs (return fuel to WVO tank or Diesel tank depending on position of valve)?

I would think this could be done simply by hooking up the 3-port valve for the return fuel opposite from the way the supply 3-port valve is hooked up, unless the 3-port valves only allow fuel flow in one direction.

So, in a nutshell, can I get my desired results by hooking up the return 3-port valve opposite of the way I have the supply 3-port hooked up?

If not, why?

Thank you,

Glenn

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