... water-proof designed 3,Environmental protection and energy saving 1, Centrifugal ventilator design, no need Jet and filter .2, Water ... -flow can adjust according to your request.3,The motor with powder coating finishing, anti - rust , reliable and longlasting .4, ... seperate motor, working steadily, use and maintenance expediently 5, The pump with protection devices, it is safe when the water used up ...