wrote in message
ups.com...
I have a 12Gal aux tank that I want to be able to transfer fuel TO and
FROM my main tank. For simplicity and lightness, I'd prefer to use a
single reversible pump on a single fuel line ... along with a solenoid
shutoff valve in series to prevent gravity flow when off.


You should be able to do this with two simple left-right switch valves.
Doesn't cost much and it's quite light.
http://www.aircraftspruce.com/catalog/appages/whfsv.php

Rob