tank overflow prevention?

[Canadian]

Originally Posted by cwickham

water doesnt have to flow back into the tank as fast as its pumped up, you can restrict it to find a good balance between over flow and the perfect level.

For all intents and purposes it does (have to flow from the display tank at the same rate it is pumped to it by the return pump). If it didn't you'd either slowly (or quickly depending upon the disparity) overfill the display tank --> too much water in the display tank --> wet floor.

The most efficient and economical solution is to add another emergency drain line a la the Herbie method.