I have similar problem and looking for help. Our basement is around 10 feet in ground in VA. After recent heavy rains we are seeing constant sump pump activity. When we dig in a corner to add additional sump pit, we noticed that ground water level is 2 inches below the slab. Here the math comes. So total ground water level is around 6 inches from top of the basement floor slab. The lowest discharge into my sump pit is around 11 inches from basement floor top. Sump pump is constantly ON because basically it is trying to pull out all the ground water in the area. And this is going to ON till ground water goes down may be another 2/3 weeks. I am planning to close that discharge and open new one right under the basement slab. That way sump pit will only work if water level is about to reach the basement floor level and flood. Do you see any issue with this approach. I am not sure if this can cause damage/break to the basement floor due to “hydrostatic pressure” . Any advise would be highly appreciated!