Open the nice package and pick up the Flexcom Automatic operated pump. Find the straight tube and put it into the thank which you want to trasfer the liquid from. Then put the hose into the tank where you want your liquid to be transferred to. Then start queezing gently the upside of the pump as the pictures below shows.You will find the liquid going well from one source to another. After transferring the liquid,please clean your Flexcom Siphon Pump ready for future usese. It is so easy and convenient to use Automatic operated Fuel/Fluid/Water Siphon Pump.