Float Facts

To make a submersible pump turn on, a switch must trigger or open an electrical circuit on the pump it is attached to. When a circuit is closed, there are no gaps and electricity can run freely. When a circuit is open, there is a gap and electricity can not pass which generates no power (similar to unplugging something from the wall). There are two types of these switches; Pump Up Float Switch and a Pump Down Float Switch. 

A Pump Up Float Switch opens the circuit when the float rises, cutting off electricity flow, and shutting off the pump. Pump Up switches, often referred to as "Normally Closed", create a closed circuit in their normal, down position. When the water rises, the float rises and opens the circuit turning off the pump.

A Pump Down Float Switch closes the circuit when the float rises, allowing electricity flow, and turning on the pump. Pump Down Switches, often referred to as "Normally Open", have an open circuit in their normal, down position. When the water rises, the float rises and closes the circuit turning the pump on. 

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