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Relatively simple system design.Units easily changed to other wells with minimum cost.Efficient, simple, and easy for field people to operate.The main advantage of hand pumps is that they are one of the most economical and simple solutions for providing a collective supply of drinking water in rural areas and suburban environments. They also help to eliminate the risks of people, and children in particular, falling into open wells.They also improve the conditions of hygiene under which water is drawn off, by eliminating the use of buckets of uncertain cleanliness, thereby limiting diseases associated with contaminated water.