It’s easier to push water than pull it, so submersible pumps are generally more powerful. The pump needs a float switch to tell it when to turn on and off. There are three main type of float ...

If your sump pump needs replaces, it will cost an average of $650 for a new pedestal sump pumps and around $1,400 for a new submersible sump pump.

Position your battery-powered pump so the float switch that activates it is several inches higher than the float switch of the main pump.