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Submersible pump

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{{Language-box|english_link= Submersible pump | french_link= Coming soon | spanish_link= Coming soon | hindi_link= Coming soon | malayalam_link= Coming soon | tamil_link= Coming soon | swahili_link=coming soon | korean_link= Coming soon | chinese_link=潜水泵 | indonesian_link= Coming soon | japanese_link= Coming soon }} [[Image:submersible pump icon.png|right|80px]][[Image:sub pump.jpg|thumb|right|250px200px|Engineers work to repair the pump for the only deep well in Damajale, Kenya, a host community for thousands of Somali refugees. Photo: [http://humanitarian.worldconcern.org/tag/disaster-relief/ WorldConcern.org]]][[Image:SubmersiblePumpDiagram.jpg|thumb|right|250px200px|Submersible pump. <br> Photo: WHO.]]__NOTOC__

For deep-well applications, centrifugal pumps are housed with the electric engine in a single unit that is designed to be submerged. Usually, a multiple-stage

pump is used. The multiple-stage pump is placed above a motor and under a check valve that leads to the rising main. Submersible pumps are self-priming, if they do not run dry. To prevent the pump from running dry, the water level in the well must be monitored, and pumping must be stopped if the water level drops to the intake of the pump.

Power is delivered through a heavily insulated electricity cable connected to a switch panel at the side of the well. The power may come from an AC mains connection, a generator, or a solar power system.

===Suitable conditions===

'''Range of depth:''' 7–200 m or more.<br>

'''Trademarks:''' Guinard; Goulds; Grundfos; KSB; Meyers; and others.

===Construction, operations and maintenance===

During pumping, the water flow and power consumption should be monitored. If the water is turbid only during the first stages of pumping, the rising main is corroding. If the turbidity continues after the first stages, the well must be cleaned or the pump will wear quickly. Running hours, problems, servicing, maintenance and repairs should be reported in a logbook.

— the main limitations of a submersible centrifugal pump are its price, the need to maintain a reliable supply of electricity or fuel, and the high level of technology involved. <br>

===Costs===

A pump for a 50–100 m head, and a flow rate of 10 m3/h, costs about US$ 2500 (1995 prices); a pump for the same head range and an output of 45 m3/h costs about US$ 7000.

===Manuals, videos, and links===

These videos by the Pan Himalayan Grassroots Development Foundation are not about recharging groundwater, but rather, building a well near an underground water source using a submersible pump:

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|{{#ev:youtube|Yw-nySGtZzM|200|auto|<center>Infiltration wells - <br>An overview (English)</center>}}

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===Acknowledgements===* Brikke, François, and Bredero, Maarten. ''[http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CC0QFjAB&url=http%3A%2F%2Fwww.who.int%2Fwater_sanitation_health%2Fhygiene%2Fom%2Flinkingintro/water_sanitation_health/hygiene/om/linkingintro.pdf&ei=cwJpT-zaO-OiiQKCst2rBw&usg=AFQjCNEWOQhTgF3a7lzhuw5OA2KmbVGxcA&sig2=Rt2EURUyGVqDcwFg6p0xAw Linking technology choice with operation and maintenance in the context of community water supply and sanitation: A reference document for planners and project staff]''. World Health Organization and IRC Water and Sanitation Centre. Geneva, Switzerland 2003.

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