[tbittner]

hmmmmm.....

If the pump isn't running then the water from the tank should drain down until it's at the level of the baffles in the container that is outside the tank. The outside container should have a baffle in it that stays full of water. As the water rises in the tank, the siphon sucks the water out of the tank and overflows that baffle into the compartment that the drain pipe is connected to.

If the size of the baffle is equal to or higher then the edge of the inside container then the siphon should never get broken unless the pump doesn't run for a very long time (weeks).