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Classical ferrocement tank

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[[Image:akkerman.jpg|thumb|right|300px|A women using her water storage tank in Guinnee-Bissau. Photo: Paul Akkerman]]

Ferrocement water tanks are made of steel mesh and wire, covered on the inside and outside with a thin layer of cement-and-sand mortar. The walls may be as thin as 2.5 cm. The classical tanks can be used for individual households or for whole communities, and they provide a relatively inexpensive and easy-to-maintain storage method. To avoid bending forces in the material, most ferrocement tanks have curved walls, in the form of a cylinder, a globe or an egg. Compared to concrete reservoirs, ferrocement tanks are relatively light and flexible. To protect the water from contamination, the tank is covered with a water tank lid or a roof that can be made of cement reinforced various materials, but is usually ferrocement. In this case, an aeration pipe with metal mesh or wirea screen is needed to allow fresh air to circulate in the tank, while keeping out rodents and insects. It is used all around A manhole in the roof gives access to the worldtank for cleaning and repairs. The construction Water flows into the reservoir through an inlet pipe, which is simple and does not require a lot of materialnormally above the water level.

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