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==Suitable conditions==
* The area should be suitable for [[rainwater harvesting]]. Volumes can be 0.5 to 30 m3.
* Tanks should not be located near a pit latrine/toilet or rubbish or on an anthill.
==Construction, operations and maintenance==
'''General advice on cement''': A common cause of cracks in structures and linings (e.g. in tanks, dams, waterways, wells) is errors in mixing and applying the cement. First of all, it is important that only pure ingredients are used: clean water, clean sand, clean rocks. The materials have to be mixed very thoroughly. Secondly, the amount of water during mixing needs to minimal: the concrete or cement needs to be just workable, on the dry side even, and not fluid. Thirdly, it is essential that during curing the cement or concrete is kept moist at all times, for at least a week. Structures should be covered with plastic, large leaves or other materials during the curing period, and kept wet regularly.
'''Specific advice''':
[[Image:Brick cement tank.PNG|thumb|right|300px|Construction of a small brick cement tank, Mozambique. Materials consist of (local produced) bricks (or blocks of hard rock), cement and steel wire. Approximately 1 bag of 50 kg cement per m3 tank volume. The bigger the volume of the tank, the lower the amount of materials (and thus costs) per m3 tank volume. Photo: Arrakis and Connect International - [http://www.arrakis.nl/reports/Manual_Fabricating_Brick_Cement_Tanks_short_03_lr.pdf Fabricating Brick Cement Tanks.]]]