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[[Image:Icon_dehydration_vault.png |right|95px]]
'''Dehydration vaults are used to collect, store and dry (dehydrate) faeces. Faeces will only dehydrate when the vaults are watertight to prevent external moisture from entering and when urine and anal cleansing water are diverted away from the vaults.'''
To prevent flies, minimize odours and encourage drying, a small amount of ash, soil, or lime should be used to cover faeces after each use. Care should be taken to ensure that no water or urine gets into the Dehydration Vault. If this happens, extra soil, ash, lime, or sawdust can be added to help absorb the liquid. Because the faeces are not actually degraded (just dried), dry cleansing materials must not be added to the Dehydration Vaults as they will not decompose. Occasionally, the mounded faeces beneath the toilet hole should be pushed to the sides of the pit for an even drying. Where water is used for cleansing, an appropriate User Interface should be installed to divert and collect it separately. To empty the vaults, a shovel, gloves and possibly a face mask (cloth) should be used to limit contact with the dried faeces.
==References==
==Acknowledgements=={{* [http:Acknowledgements Sanitation}}//zoomzap.com/manuals/SES/download-esp.php Manual del Sanitario Ecologico Seco.] A very comprehensive manual on dry chamber construction including detailed instruction and material lists. In Spanish.
==References * GTZ (2005). [http://www.sanimap.net/xoops2/uploads/gnavi/12_2.pdf Urine diverting dry toilets programme dissemination] (data sheet). GTZ, Germany. General overview of Dehydration Chambers with some dimensioning and external links==materials lists.
* Winblad, U., and Simpson-Herbert, M. (-eds.) (2004) Manual del Sanitario Ecologico Seco. Available: http[https://wwwwiki.umn.edu/pub/EWB/Uganda/SIDAGuidebook.pdf Ecological Sanitation - revised and enlarged edition].zoomzapSEI, Stockholm, Sweden.com (A very comprehensive manual on dry chamber construction including detailed instruction general description of various designs and material listsadaptations, especially Chapter 3. In Spanish.)
* GTZ (2005)[http://www.wecf.eu/index. Urine diverting dry toilets programme dissemination php Women in Europe for a Common Future] (data sheet2006). GTZ, Germany. Available[http: //www.gtzpermacultuurnederland.org/permacultuurtk/urinedivert.pdf Urine diverting Toilets: Principles, Operation and Construction].de (General overview Photos and explanation of Dehydration Chambers with some dimensioning how to build a double vault and materials listssuperstructure.)
* Winblad, U., and Simpson-Herbert, M. (eds.) (2004). Ecological Sanitation - revised and enlarged edition. SEI, Stockholm, Sweden. (A general description of various designs and adaptations, especially Chapter 3.)==Acknowledgements== * Women in Europe for a Common Future (2006). Urine diverting Toilets{{: Principles, Operation and Construction. Available: http://www.wecf.de (Photos and explanation of how to build a double vault and superstructure.)Acknowledgements Sanitation}}