Tanks
The two tanks are sent to a 3 way valve (Really a two way valve but they call them a 3 way valve... Don't ask me).
The returns also go through a 3 way valve on the way back to the tanks.
You can draw out of and return to either tank at any time.
This worked great for us, for 10's of thousands of miles.
Pumping between tanks was not something that we found to be really as useful as you might think. We liked keeping the tanks separate in case of contamination or other bad fuel.
Guy
The two tanks are sent to a 3 way valve (Really a two way valve but they call them a 3 way valve... Don't ask me).
The returns also go through a 3 way valve on the way back to the tanks.
You can draw out of and return to either tank at any time.
This worked great for us, for 10's of thousands of miles.
Pumping between tanks was not something that we found to be really as useful as you might think. We liked keeping the tanks separate in case of contamination or other bad fuel.
Guy