We have noted this many times before. When stowing your dump tank, be sure to stow the drain sleeves in a position where they are ready for the next tank deployment. For the older style drain sleeves (the ones secured by rope), a best practice is to tie up those drain sleeves on the inside of the dump tank. That way, when water is loaded into the tank, the sleeve is held closed and does not leak. Too many times we see the drain on the outside of the tank - tied too loose - and all of sudden - water is cascading across the dump site and making a big mess. As with anything - your equipment is only as ready as the last person who put the equipment away made it!
When using the older stlye of "rope secured" drain sleeves, the best practice is to "tie up" the sleeves on the insie of the tank. That way the water pressure helps hold the sleeve closed - and when ready to empty the tank - simply untie the drain sleeve and pull it through.
Best practice - tie up the older style drain sleeves on the inside of the dump tank.