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[[Image:Icon_single_ventilated_improved_pit.png |right|80px]]
'''The Single VIP is a ventilated, improved pit. It is an improvement over the [[Single Pit | Single Pit]] (S.2) because continuous airflow through the ventilation pipe vents odours and acts as a trap for flies as they escape towards the light.'''
Despite their simplicity, well-designed single VIPs can be completely smell free, and more pleasant to use than some other water-based technologies. Flies that hatch in the pit are attracted to the light at the top of the ventilation pipe. When they fly towards the light and try to escape, they are trapped by the flyscreen and die. The ventilation also allows odours to escape and minimizes the attraction for flies.
===References ===
* Mara, D. D. (1984). The Design of Ventilated Improved Pit Latrines. UNDP Interregional Project INT/81/047, The World Bank and UNDP, Washington, D.C., US. :Available at: [http://documents.worldbank.org/curated/en/home documents.worldbank.org/curated/en/home]
* Mara, D. D. (1996). Low-Cost Urban Sanitation. Wiley, Chichester, UK. (Provides detailed design information)
* Morgan, P. R. (2009). Ecological Toilets. Start Simple and Upgrade from Arborloo to VIP. Stockholm Environment Institute,Stockholm, SE. :Available at: [http://www.ecosanres.orgecosanres.org] * Morgan, P. R. (2011). The Blair VIP toilet. Manual for Upgradeable BVIP Model with Spiral Superstructure and Tubular Vent. Stockholm Environment Institute, Stockholm, SE. :Available at: [http://www.ecosanres.org ecosanres.org] (Provides detailed design and construction information) * Ryan, B. A. and Mara, D. D. (1983). Ventilated Improved Pit Latrines: Vent Pipe Design Guidelines. UNDP Interregional Project INT/81/047, The World Bank and UNDP, Washington, D.C., US. :Available at: [http://documents.worldbank.org/curated/en/home documents.worldbank.org/curated/en/home]
See S.2 for additional reading materials.
===Acknowledgements===
{{:Acknowledgements Sanitation}}