Alderon Altra™ 2004748 Wide Angle Pump Down Switch with 20' Cable 15 Amp - The Altra™ Pump Switch is used to turn a pump on and off in environments with temperatures up to 140 degrees Fahrenheit. This product can be used for a variety of applications, including but not limited to: septic tanks, sump pits, holding tanks, pump chambers, water tanks, and any other liquid tanks. The pump switch is mechanically operated using a microswitch and is activated by the ball inside the float housing.