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The organisation IDE in Asia is developing several models A low cost alternative to metal or ferro-cement tanks for storing of water are plastic-lined tanks. One model consists Several models have been developed, for example:* A cylinder of sheet metal containing a 1500-litre large (eg. 1 500 liter) reinforced plastic bag that fits inside a cylinder of sheet metal. Another model is * a plastic liner reinforced with a 10 m3 000 liter plastic bag and , installed in a hole in the ground.
5 m3Depending on the size of the design; 1 500 to 10 000 liter.
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[[Image:Plastic-lined_tank_icon.png|right]]
Open storage tanks can be made of earth. If clay is not available, a plastic lining is needed to stop water from leaking away. Linings can be made of standard plastic sheet glued together with the tar normally used to repair roofs. The plastic must be covered with earth to prevent it from being exposed to the sun.
[[Image:Plastic-lined_tank.PNG|thumb|right|150px|In Nicaragua earth is used to construct open storage tanks ]]
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== Capacity ==
== Costs ==
Material for a tank of 5 m3: 12 m2 of plastic sheet, 3 m of PVC tube and labour.
== Examples and initiatives ==
The [http://ideorg.org organisation IDE] in Asia is developing several models of plastic-lined tanks.
== External links ==
General [http://www.ideorg.org www.ideorg.org ] [http://www.practicafoundation.org www.practicafoundation.org ]