I was asked how you can lift the water up to 5 meter but you are not allowed to use any kind of pump. What I thought; seal the container from where water is being lifted. Connect it with a pressure vessel at some height which is containing steam and water with valve in between them. By default valve is closed. Now wait for steam being cooled in the vessel that would create a vacuum inside the vessel. Then open the valve. One more thing vessel is kind of cylinder and Kind or cover is placed at top of inside the vessel which will go down during cooling of steam; so that I would be able to make vacuum that is effective as I am stopping any kind of evaporation or boiling. There is a provision of tap below vessel to drain out some water also. After all these things I ended with a reciprocating pump only.