Next time you are sucking on a bottle of water or soda, put a full lip lock on the bottle and suck. Watch the sides cave in!
Think that would happen if the bottle had a vent and it was open???
G'day Jocholik, mate it's better to sound stupid than prove it and this is why these forums are here, to assist one another. Every fuel tank needs a vent of some description.
Dean
I keep my vent open all the time on plastic tanks. If it gets hot and the vent is closed it will spew gas all over your boat. Once it cools down at night (here anyway) I have had my tanks collaspe and deform. I only close them if I am carrying them around.
