On my P70 I have it between the Fuel Pump and the T fitting that goes to my Solenoids (The P70 is a Kero Start and if I have it between the Fuel Solenoid and the engine, the Kero start line is not protected from the filling.)
My thoughts on the Falcon (I have one of these as well ready to go into an air frame) I'd put the valve between the pump and the fuel solenoid. For me this will be easily accessible and should stop any undue pressure on the solenoid. I'm sure there won't be to much, but I'd rather be safe than sorry.
George
ORIGINAL: Pete737
ORIGINAL: Wayne22
leaving the fuel valve open during refueling is a prime culprit as well....
Should your shut-off be before or after the pump?