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For wells down to 35 m, rope pumps are often five times cheaper and more sustainable than piston pumps. Evaluations show that rope pumps on communal wells are being maintained by Small-scale irrigation in India usually involves the users, if introduced properly. 90% use of rope diesel or electric-powered suction pumps remain operational, even after many yearsdrawing water from water tables down to 7 m deep. Because of its low cost, the The India-North Bengal Terai Development Project carried out pump is also popular for domestic use. A survey among 5energy analysis,025 rural families in Nicaragua indicates which showed that a rope pump increases incometube well screens excessively restricted water flow, even if used for domestic purposes onlyresulting in low overall pumping efficiency. Families with Improving these screens resulted in a pump earn US$ 220 per year more than families without a pump. In Nicaragua the pumps are now being produced commercially by 20 workshops. Different models reduction of fuel consumption of Rope pumps were introduced in Africa. This introduction has not always been successful: in some projects over 8040% . Since publication of the pumps do NOT work! Howeverthis innovation, thousands of wells have been fitted with the "right" models and the "right" user trainingnew screens, upto 90% remain in operation in Africa, as with benefits for the Victory model in Ghana profitability of farming and the Elephant model in Zimbabwe have provedfor reducing CO2 emissions.
[[Image:Bamboo_screens.PNG|thumb|right|150px|[[Rope pump | Rope pump ]], (Victory model) on a handLow-dug of 20 meters deep well, made in a local workshop in northern Ghana cost bamboo screens that improve pumping efficiency]]
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