I’ve installed water pumps, sump pumps, you name it.  But the all work using our precious electric energy.  Well, I have seen hydraulic pumps before that use no electricity and glad to say they may be the future alternative for exisiting electric pumps. I am sure you can apply this hydraulic pump to various different applications including a water pump to add more water pressure to your gardening equipment and other pumping equipment. I will have to head over to Home Depot and see if I can make my own high-pressure hydraulic super soaker. This instructable shows how to build a fairly simple water pump that needs no energy input other than water flowing from a higher point to a lower point. Most of the pump is constructed from PVC, with a couple of bronze pieces thrown in for flavor. I was able to source all of the parts from a local hardware store (Lowes) for a bit under $100. To function, the pump does require a reasonable amount of water that will drop at least 3′-5′. The level that the pump can raise water to depends on the water’s head (total drop the water will make). via instructables