[[Image:Treadle_pump_icon.png|right]]
[[Image:Treadle_pump.PNG|thumb|right|150px250px| The bamboo version of the treadle pump used in Bangladesh]]
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The treadle pump is a foot-powered water pump widely used in Asia and spreading in Africa. It consists of two metal cylinders with pistons that are operated by a natural walking motion on two treadles.
* The Concrete Pump: has PVC cylinders embedded in a concrete body. This prevents corrosion of the device in regions with saline groundwater. It is mounted on a borehole to draw from groundwater.
* Plastic Pump: Using only plastic in the construction prevents corrosion in regions with saline groundwater. It can also be mounted on a borehole to draw from groundwater.
==History and social context==
The treadle pump was designed by the Norwegian engineer, Gunnar Barnes in the 1970’s. It was first developed and used for irrigation in Bangladesh in the late 1970’s.
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==Technical specificationConstruction, operations and maintenance==
====Design====
* Cylinder diameter: 3.5 inch and 5 inch (90mm - 130mm)
* Type of well: collapsible tube well or dug well
====Manufacturing and Materials ====
Treadle pumps can be manufactured locally in simple metalworking shops. The treadles and support structure are made of locally available, inexpensive material, such as bamboo. All components (or junction box) are made from mild steel; Piston-mild steel with plastic seal (cup Seal); foot valve-leather flap; rising main-PVC pipe or bamboo; various types of screens are used.
====Installation====
The installation of the Treadle pump is easy and does not need any lifting equipment or special tools. The drillers who sink the tube
well with the sludger method also install the pump.
====Operation====
Two pedals are connected to the two pistons. The pump is powered by shifting the weight from one pedal to the other, lifting the pistons. Water is supplied through a hose which draws water from a borehole or surface water.
If designed correctly, treadle pumps can be easily maintained with standard replacement parts available in local markets at a low cost. All repairs can be done without the use of tools.
==CostCosts==
* A treadle pump costs US$ 20 in Bangladesh, and US$ 50-80 in Africa.
* Approx US$ 100-200 including tube well (depending on installation depth and drilling method)
* The cost of introduction lies around US$ 20,000 per project, including training, engineering and first production.
==Country Field experiences==
The Treadle Pump is widely used in Asia, and increasingly used in Africa.
==Manuals== ==MoviesReference manuals, videos, and links==
* [http://www.youtube.com/watch?v=KH2I2ZKD_98&feature=related Treadle pumps in Uttar Pradesh, India, introduced by IDE-India]. Movie produced by [http://www.ashdenawards.org/winners/idei Ashden Awards].
==Links==
* [http://www.ashdenawards.org/winners/idei Ashden Award article on Treadle Pumps by IDE-India]
* [http://ide-india.org/ide/treadlepump.shtml Treadle Pump programme, IDE-India]
* [http://www.rwsn.ch/documentation/prcollector.2009-04-05.2482958002/skatdocumentation.2011-07-01.0268979788/file 'Low Cost Handpumps' RWSN Field Note 2011-3]
==ReferencesAcknowledgements== {{Joinus}}
