Either the supplied filter with the engine (Jetcat - mount it vertically, not on it's side) or
a Sullivan Crap Trap two stage filter.
From my fuelling station I use an automotive in line paper cartridge filter.
I plumb it UAT - ball valve - pump - solenoid - filter - engine.
Australian regs require a radio controlled engine shut off independent of the
engine electronics, I use a servo on the ball valve but the ball valve can still
be used manually. - John.