Quote Originally Posted by bergermaister View Post
Right - thinking the same thing. I'd be worried about adding a port on the bottom, bag getting full, then POP! and the flood begins.
To get two ports on the bottom, I just took the 1100lb bag and flipped it upside down. Unfortunately this leaves the 3rd port on the end of the bag rather than the top, so it doesn't vent past 3/4 full. Thus wanting to add a vent port...