[[Image:Vaults_and_chambers.PNG|thumb|right|200px|[[Vaults and chambers |Dy]], in South Africa(for credits, click the picture)]]
[[Image:Dehydration.PNG|thumb|right|200px|[[Dehydration |Dehydration]], in Ecuador (for credits, click the picture)]]
When urine is separated from faeces, the faeces dry quickly. In the absence of moisture, organisms cannot grow and as such, smells are minimized and pathogens are destroyed. Vaults used for drying faeces in the absence of urine have various local names. One of the most common names for this technology is the Vietnamese Double Vaults.
===Health Aspects/Acceptance ===
[[Image:Dehydration.PNG|thumb|right|200px|[[Dehydration |Dehydration]], in Ecuador (for credits, click the picture)]]
Dehydration Vaults can be a clean, comfortable, and easy-to-use technology. When users are well educated and understand how the technology works they may be more willing to accept it as a viable sanitation solution. When the vaults are kept dry, there should be no problems with flies or odours. Faeces from the double vaults should be very dry and relatively safe to handle provided they were continuously covered with material and not allowed to get wet.