Simplex - Basic means of control for a single pump motor. The base model requires two switches to control the on and off state of the pump motor.

Duplex - Basic means of alternating control for two pump motors. The base model requires two switches to control the on and off state of the pump motor. The alternating action equalizes pump motor wear. In addition to the alternating pump control, these systems provide override control should either pump fail. If an alarm condition occurs, an alarm switch activates the audio/visual alarm system.

Triplex - Basic means of alternating control for three pump motors. The base model requires two switches to control the on and off state of the pump motor. The alternating action equalizes pump motor wear. In addition to the alternating pump control, these systems provide override control should either pump fail. If an alarm condition occurs, an alarm switch activates the audio/visual alarm system.