How they work: Battery-powered systems use a float switch to activate the pump when the water level in the sump pit rises. Drawing power from the battery, the pump discharges the water through the ...

The pump needs a float switch to tell it when to ... drains dug into the floor and sloping toward the sump pit, may be needed ...

To myself and my neighbors in arid California, people with enough rainfall and a high enough water table to need a sump pump ...