Learn more about the cost of repairing a sump pump, including maintenance and when to know it’s time to repair.

We switched to one with a balloon type of float switch, but the switch sometimes gets stuck because our sump pit is very narrow. Because our sump pump runs so often, the switches frequently go bad.

How a Sump Pump Works A sump pump accomplishes its task using water sensors, a pumping mechanism, and a discharge line. Typically, a float switch rises with the water level in the sump pump pit.

A tethered float switch is a floating ball attached to the pump by a cord. It pivots as the water level rises, allowing a steel ball inside it to trip the switch.

CR tested popular brands of sump pump backup systems to find the ones that will keep your basement dry in the worst weather conditions.

If that doesn’t do the trick, you might need to replace the float switch. Unless you’re experienced with electronics and sump pumps, this is something you might need to call your plumber to ...

Unplug the pump. Most sump pumps have two plugs: one for the motor and a second that controls the float switch. The float switch is a sensor. When it detects rising water, it turns on the pump.

The Consumer Reports sump pump backup system buying guide covers the types, features, and other must-know topics about sump pump backup systems.

A: The Zoeller submersible pumps that I reviewed have a float switch that automatically turns the pump on when the water level in the pit reaches anywhere from 7½ to 9½ inches depending on the ...