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Most common diesel and petrol pumps are suction pumps that can pump from shallow wells down to 7 m. deep. Pumping from deeper wells requires generator pump sets or long-shaft diesel pumps costing US$ 800 or more. Where there is electricity, submersible pumps can be used but many small farmers do not have electricity.
Motorised rope pumps can pump from deep wells, up to 60m. <ref>[http://www.practicafoundation.nl/products/pumps/motorized-rope-pump/ Information on Motorized rope pumps on the website of Practica Foundation]</ref> This model combines a rope pump with an electric motor or petrol engine. Pump parts and other elements of the structure can be produced in local workshops, the engines are often imported.
If combined with a locally available small petrol engine the cost of a motorised deep-well pump can be US$ 450. This is far cheaper then long-shaft diesel pumps or submersible pumps and this cost can even be less when Chinese engines are used.