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A vault toilet is a non-flush toilet with a sealed container (or vault) buried in the ground to receive the excreta, all of which is contained underground until it is removed by pumping. A vault toilet is distinguished from a pit latrine because the waste accumulates in the vault instead of seeping into the underlying soil.
When the tank fills with water, the air trapped inside compresses. When the air pressure inside the plastic tank reaches a certain level, the tank stops filling with water. A high-pressure valve located in the center of the vessel holds the air and water inside until the user flushes the toilet. [12]
When the handle of a flush toilet with a tank (British, cistern) is turned, a discharge mechanism is activated by means of a rod or chain. The mechanism may be a flapper valve, which is designed to sink more slowly than the water - allowing the water to exit to the toilet bowl below, so that the tank may empty.
This may be the flushing sort, which is plumbed into a cistern (tank) operated by a ballcock (float valve). Or it may be a dry model, which does not need water. The toilet room may also include a plunger, a rubber or plastic tool mounted on a handle, which is used to remove blockages from the toilet drain. Toilets often have a wall mirror above ...
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Ideally, the shelter or small building should have handwashing facilities available inside or on the outside (e.g. supplied with water from a rainwater harvesting tank on the roof of the shelter) although this is rarely the case in practice. In the shelter, anal cleansing materials (e.g. toilet paper) and a solid waste bin should also be available.