Float Switch

The Float Switch is put in your oil tank and turns off the pump to the oil tank once the tank is full. 

The Float Switch has liquid conductor inside of its plastic casing. When your oil tank needs more oil, the Float Switch will be pointed down, turning the pump to your oil tank on. Once your oil tank fills up, the Float Switch will start floating on top of the oil, making it upright. The liquid conductor inside of the float switch will sink to the bottom, creating no connecting and turning the pump to the oil tank off

* Above price does not include shipping