I want to source an in-line one-way valve suitable for diesel, to prevent
flow back to the tank
when the ignition is off.
This can either be a conventional non-return valve suitable for approx 5mm
bore rubber
pipe (preferred) or a 12 volt solenoid operated valve, open when ignition
on/activated.
I know these were used on a Lotus at some time (presumably petrol - but I
guess diesel
is less aggressive) and possibly many other cars as well..

Can anyone tell me where I might get one of these please ?

Thanks,
Nick