As shown in the figure, it is used to evacuate the air in the suction hose. It provides comfort by eliminating the process of carrying and filling with bucket as in the old days. The illustration shows the example of the pump in the tractor PTO driven pump. It is also used for the other centrifuge pumps. Mount as shown in the illustration and tighten the hanger connection bolts firmly. If the outlet flange of the pump is not plugged, connect it to the suction pipe of the air intake funnel above the pump. Close the outlet valve on the pump. ¾ Open the ball valve under the pump. Discharge the air from the suction hose by moving the lever up and down thanks to high suction power. When you see water coming in the pump, close the bottom suction valve of the pump and open the valve at the pump outlet and give way to your pump. This product will provide great convenience for your pump use.