After many years of a dry basement we added on a new addition and have water problems. We've graded and installed plastic sloping away from the addition but there is ledge in one corner and we appear to be getting ground water.
We had the contracter cut a sump hole in the floor of the addition and I'm planning on buying a sump pump.
The sump hole is 11" in diameter and is only 11'-12" deep.
I see that there various submersible sump pumps, some with diaphragm switchs, some with vertical float, some with magnetic, etc.
I'm thinking that given the small size of the hole and the depth I may be better with a sump pump with a diaphragm switch but I'm not sure what the pros and cons of the various types are and haven't had any luck finding comparisons.
Does anyone have words of wisdom as to the relative merits of the various switches?