Quote Originally Posted by drgnbttrfly View Post
especially if your pump also backflows into your sump
Not to derail the thread, but you do have a break-siphon hole in your return, right? If it is clean and working properly, an overflow should not drain more water from the display than the top level of the overflow.

I have made that mistake before too...but I did get a nice new floor out of it...at MY cost.