DieselBound
Elite Member
I can't really say how my setup does this: only had it for about 6 months. It's a "certified" diesel fuel tank (sold specifically for it), in which case I'd think that it ought to be designed with such things in mind? It has one hole that has a radiator cap on it; that obviously should work for positive pressure, but no idea on negative pressure. I don't pump a lot of fuel out at a time so maybe that's why I haven't encountered any problems. I tend to periodically twist the cap and let out pressure (built up from outside temperatures), maybe I don't need to?