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A MAPET consists of a hand pump connected to a vacuum tank mounted on a pushcart. A hose is connected to the tank and is used to suck sludge from a pit. When the hand pump is turned, air is sucked out of the vacuum tank and sludge is sucked up into the tank. Depending on the consistency of the sludge, the MAPET can pump up to a height of 3m.
A motorized version of the MAPET is the [[Motorized Emptying and Transport#Vacutug|Vacutug]], developed by UN-Habitat.
===Cartage systems===