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EMAS pump

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{{Language-box|english_link= EMAS 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=EMAS泵 | indonesian_link= Coming soon | japanese_link= Coming soon }} [[Image:Canzee_icon.png|right|80px]]

[[Image:Deep_well_pump.PNG|thumb|right|200px|EMAS type pump produced and used in Malawi. Photo: Netherlands Water Partnership.]]

[[Image:EMAS3.jpg|thumb|right|200px|An EMAS pump in Nicaragua, made by Paul Cloesen. More at [http://www.flickr.com/photos/paulcloesen/ Paul Cloesen Flickr stream] ]]

[[Image:EMAS1.jpg|thumb|right|200px|An EMAS pump at the WOT, University of Twente [http://www.wot.utwente.nl], the Netherlands.]]

[[Image:diagram installation.jpg|thumb|right|200px|Diagram of a set of water faucets around the house]]

__NOTOC__ <small-title />The EMAS pump (also called the EMAS Flexi pump) is a very cheap PVC piston pump for family use, which can both pump water from a well and pump it to an elevated point. For example, it can pump water from 20 meters underground directly to an elevated tank another 20 meters above the ground level. The ability to pump directly to a storage tank avoids handling of the water, which avoids contamination.

The EMAS pump compresses water between two one-way valves (check valves produced with glass marbles), a footvalve and a piston valve. Water is forced up the piston tube and comes out of the pump handle.

EMAS is not only the name of the mobile school for water and sanitation, but also a whole technical and social concept of water and sanitation which includes rain water harvesting, solar water heaters, windpower, hydraulic rams, water treatment, small tanks and sinks, a variety of hand and foot pumps, and ferrocement tanks. The aim of the technologies and systems is to achieve the necessary supply of drinkable water, and water for micro irrigation in rural and sub urban areas.

===Suitable Conditions== =

The EMAS pump is designed for household water supply at family level. Large diameter models can be used for small scale irrigation if the water is very superficial.

EMAS pumps can be used to pump to a depth of 40-50 m. Deeper than 40-50 m, the pumping becomes very heavy. The EMAS pump can pump up to 30 l/min from a depth of 10 m, when operated by hand. Total production is up to about 5 m4/day. (That is: 5 m3 from 1 m depth or 0.5 m3 from 10 m or 250 l/day from 20 m depth etc.).

'''Lifespan'''<br>

The lifespan of an EMAS pump can be estimated as 2 million liters pumped. PVC pumps are not as sturdy as metal ones. Ideally, they should serve a single family who owns and maintains it. Communal use is possible if maintenance and repair are well organized, but a single pump is not recommended to serve more than 100 people.

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! width="50%" style="background:#efefef;" | Advantages

! style="background:#ffdeadf0f8ff;" | Disadvantages

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| valign="top" | - Comfort of having water supply in the house <br>

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 ===Construction, operations and maintenance=== The [[EMAS pump]] and [[Small household Classical ferrocement watertanks tank |ferrocement tank ]] need to be operated correctly.

Rural people are easily taught to build their own, using two (glass) marbles, simple PVC pipes, thread adapters and (galvanized) iron pipe, available in any hardware store. The pump uses a gasket that is made from the nylon-reinforced sidewall of used tires, which is widely available and already used in most rural areas for other purposes. Having built their own pump, people are able to maintain it forever. Only basic hand tools required.

The piston gasket (made from the nylon-reinforced section of a used tire) can wear slowly over time and and must occasionally be replaced. This can be done easily and in less than an hour by a user that understands the simple operation of the pump. If the pump is constructed properly, there will be a range in which the gasket can be adjusted to achieve the proper balance between ease of pumping and hydraulic efficiency between replacements.

===Costs===

The EMAS pump costs about US$ 5 (mainly the metal handle), with 1 US$ extra for each meter depth. (prices from Nicaragua, 2006).

* Tools: US$ 50 - 200 if everything has to be bought new.

===Field Experiences== =Some 20,000 EMAS pumps are in use in Bolivia and some 10,000 in Brazil. It is used in Peru, Equador and Nicaragua. Successfully introduced in South-East Asia (a.o. post-tsunami Sri Lanka) and several African countries. Successful introduction is variable however, depending on capacity and motivation of early adopters. If people built their pump themselves, they are usually kept in good working condition for years. ===Manuals, videos and links=== ====Videos==== {|style="font-size: 125%"|-|{{#ev:vimeo|8454714|200|auto|<center>How to build a kitchen sink<br>EMAS water system</center>}}|{{#ev:vimeo|51002714|200|auto|<center>EMAS summary of all <br>technologies</center>}}|{{#ev:vimeo|51002712|200|auto|<center>A mechanical drive for <br>all EMAS Pump types</center>}}|}

==Reference manuals, * Step-by-step 10 short videos, and links=: [http://www.youtube.com/view_play_list?p= 7CB221C67FA47CE5 Build an EMAS Pump]. By Simple Water Technology.* Many of the EMAS technologies can be seen on [https://vimeo.com/emas The EMAS Vimeo Channel]

====Other resources====* How [http://geocities.com/paulcloesen/DocEMAS/Build-an-EMAS-pump.doc Illustrated EMAS pump construction manual], by Paul Cloesen* [http://www.food-security.info/pdf%20(English)/ECHO%20(English)/PVCBallValvePumps.pdf A similar design published by ECHO]* [http://georg-ritter.info/wp/wp-content/uploads/2011/12/WATER_FOR_EVERYBODY.pdf WATER FOR EVERYBODY: A Selection of Appropriate Technologies to build a kitchen sink be used for Drinkable Water EMAS.] Wolfgang Buchner, 5th edition, 2006.* The Technology Demonstration Center EMAS works with EMAS pumps. See [[Technology Demonstration Centers|Akvopedia article on Technology Demonstration Centers]].* [http://www.emas-international.de/index.php?id=32&L=3 EMAS website in English]* [http://www.rural-water-supply.net/en/resources/details/289 Low-cost pump alternatives for rural communities in Honduras (rope- and EMAS pumps), SKAT website]* [http://vimeowww.geocities.com/8454714leonvida/Leonvida/Logros.htm Comité Sí a la Vida (Nicaragua, in Spanish)]* [[Solution_of_the_week_7|Akvo solution of the week 7]]

===Acknowledgements===* [http://paulcloesen.50webs.com/DocEMAS/Build-an-EMAS-pump.doc Building an EMAS Pump]. or ([http://www.infolizer.com/p1aul3clo5es5ena1509n5eb2sa13com/Building-an-emas-pump-paul-cloesen.html alternative link]). Paul Cloesen, December 2007.

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