please build a cam onto the valve stem (of the return valve)

and have the cam turn on the pumps (via switches) so that fuel source
follows fuel return automatically.

Another way to do this is to use one of the pump switches to also turn on an
electric solenoid valve, thus switching the return to

that tank.

John Slade
Cozy IV

John,
do you have any particular type of solenoid valve in mind? The upside is that one switch would switch tanks and  fuel return.
The down sides are that there are more electo-mechanical devices to break, is there a provision to run both pumps for critical operations?. And, there might be fuel return issues- too much fuel back to one tank, resulting in an overflow.
 But, in a worst case scenerio, the worst I could do is dump only half my fuel. : )

Other people have suggested using the  manual fuel return selector to actuate the apropriate fuel pump through the use of some sort of microswitch or some such thing. If I can figure out a way to build a robust enough setup, that might be the way to go.

Decisions, decisions,....

Brian Trubee

 
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