I worked with pumps and float systems all the time when i was underground.

Our de-watering system was cascade style coming up form 5000 feet below the surface, I forget how far below sea level we were there.

Some sumps would pump down 4 foot before shutting off and others we would only pump down a foot and a half.

How much drop are you planning haveing to start your pump??


The floats worked great but the water was...?? Hard. for lack of a better work. and growths and erosion and rust, such would give us troubles.


Water is the basis of all life, by design!