In these days of engineering advances, we are used to seeing things that were once common go out of style. Having said that, the hand well pump is still used all over the world, and it is one of the most valuable objects many people have. Getting a safe, clean drink and being able to maintain hygienic and sanitary environments in their homes is a luxury for many.
An ordinary manual unit can pump from about twenty feet down. There are ways to boost the depth of the draw, such as using a very narrow pipe. For under developed populations, the simplest design may work most effective, since maintenance may be neglected and spare components hard to get. Researchers work to create units constructed with materials that can be obtained locally and that can work with the least number of parts that can break.
The handy innovation still serves many people around the world, and there always seem to be those who prefer to be self-sufficient and to rely on their own power, rather than the kind that is acquired from an outside source. Actually, in light of uncertain weather and unstable politics, it would behove all of us to know the arts of getting the necessities of life in a crisis.
The hand water pump that brings this element so necessary for all life to where it is needed is truly one of the major developments in the history of the human race. It is also within reach of all, being easy to make with things from any hardware shop for as little as $20. Go online to learn more about the history, uses, and variations on this truly great invention.