if you change all the wires to blue ones the boys in the clean white suits might show up ;-)
https://www.youtube.com/watch?v=_xRCbdFrSSc&ab_channel=NapoleonXIV-Topic
I ordered some various hoses and some of the fuel line I got was "marine grade" its a LOT thicker than normal line and has some thread in it.. Not metric but it might work?
mine leaked what was in the tank just before I bought it, it was a good time to make an offer ;-)
The color, who cares, Id just not want to take that kind of risk, leaking a whole tank of fuel might be a tad dangerous.
hey you can always use blue electrical tape on all the wires ,, ;-)