John Slade wrote:
>
> I have independant tanks, pumps and filters leading fuel to a T just before
> the rail. No fuel valve and independant switching of the pumps on seperate
> batteries. The return is plumbed to a solenoid which defaults to the right
> tank when off. When energized the return flips the fuel to the left side. By
> switching the solenoid off when pumping from the left tank, or vise versa, I
> can transfer fuel as needed. I'm wiring a crossfeed warning to prevent
> inadvertant crossfeed. Ideally I should put check valves before the fuel
> pipes T at the firewall, but havent done that yet.
>
> Regards,
> john Slade

Use a double pole switch to control the two fuel pumps. Use the second
pole of the switch to control your fuel return solenoid valve.  Then the
system is automatic and always return the fuel to the proper tank  --
the one that is being used at the moment.

Rino