Dave H M wrote:
I just have a basic education but do not understand how all the H2O can evaporate once the air in the pocket above the liquid in the tank becomes 100% humidity. I say it is impossible for all that moisture to circulate/rotate or whatever out the vent. There is no means for air to exchange.
The vent provides air exchange, particularly if you are talking weeks or months...might be if it's only a 1/2 inch before it becomes an issue. I haven't experimented with how fast the water evaporates but no doubt it does.
