Features: These pumps have advantages of small volumn, light weight, lower noise, long-working time and without repaire. Some types have the automatic device inside. The best features that it can be automatically turned on or off. When the water level reaches the certain height, it can automatically turned on and discharge water, Or it will be automatically turned off. Application of the pump is much more widely. Whole motor casing is made of plastic, which make the pump have much better insulation performance and delicate apperance Main use: Cooling and offering water-circulating to air-conditionings; Conveying water-circulating to industrial equipments; Automatically discharging the basement hydrops