2D-SY40/100, 2D-SY18/100 electric pressure test pumps are applied with speed reducer, through the work of main shaft, push the column bolt to move back and forth in order to discharge the pressured liquid. The pump itself is set up as contraposition at the top of water tank, as it is easy to disassemble the parts inside the water tank as well as doing the maintenance. Water tank is divided into 2 parts set at both sides of the pump and speed reducer, therefore the structure is compact and gook looking.