This model of pump is characterized with high heads, compact size, light weight and convenient use and vastly used in high-position water delivery, flush and places as construction sites. The 3-phase motor pump has a more stable function. The float switch can automatically control on and off with the change of the liquor level. The protector in the motor can automatically cut off the power when it overheated or overcurrented, Thus guarantee the security and reliability of pump's operation even in the atrocious environment.