Types of Sump Pump Switches

Pump switches provide automatic control of a pump. At JMI Pump Systems, we offer a variety, each designed to provide the best solution for your application.

Diaphragm Switches

Activated by water pressure, diaphragm switches are attached very low on the side or the body of the pump. The pressure on the switch increases as the water level rises and when the pressure increases enough to compress the bladder in the switch, it activates and turns the pump on. When the water level falls, the pressure on the bladder is reduced and it re-expands. The switch is de-energized and turns the pump off.

Tether Float Switches

As the name implies, the float is tethered to the pump and is usually used in sewage pumps or larger basins. When the water rises, the float rises causing the tether to flip the switch and turn on the pump. As the pump lowers the water level, the float drops, releasing the switch and shutting off the pump. However, some caution is advised. The float may get run up against the basin wall or pump, so always run for at least three cycles after install to confirm the appropriate tether length and that the switch will rise fully/freely.

Vertical Float Switches

This is a solid ball that floats above the water. As the water level rises, so does the float, which will trigger the switch to turn on the pump.

Electronic Float Switches

Internal sensors detect the water level. Once the switch is triggered, power is transferred to the pump, turning it on. When the water level decreases, the switch is triggered again, shutting off the power to the pump.

All Switches

We believe a piggy-back switch style (plug the pump directly into the switch plug) is one of the best options as they allow you to test the switch and pump separately when trouble shooting.

Not sure what is best for your application? Your Partners in Pumping at JMI are available at 262-253-1353 or sales@jmipumps.com to assist you.