amiciKart AK-SMPP-3G-18 18W Submersible Pump for Desert Air Cooler (Grey) Caution & maintenance: do not ever run the pump dry do not lift the pump by power cord operate the pump completely submerged for proper cooling dust and dirt particle can reduce the life of the pump. Use small brush or stream of water to remove debris. Regular maintenance will add to efficiency and life of the pump.