[[Image:siphon.png|right|100px80px]]
[[Image:siphon2.png|thumb|right|200px| Siphon filter as sold in shops]]
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The Siphon filter is a candle-type water filter which uses siphon pressure to force water through a high-quality ceramic filter element. The innovative useage of the siphon results in a high flow rate of 4-6 liters per hour. The Siphon filter is very compact, as only a filter element, a plastic hose, and a valve are needed, while existing storage containers can be used. A washable fabric is used as a pre-filter before the water enters the ceramic element. Therefore, protecting the ceramic filter from premature clogging when using turbid water.
The filter is designed as a point-of-use filter in households. The filter element is impregnated with silver in order to increase the efficiency of the filter.
===Suitable conditions===
{| border="1" cellpadding="5" cellspacing="0" align="center"
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! width="50%" style="background:#efefef;" | Advantages
! style="background:#ffdeadf0f8ff;" | Disadvantages
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| valign="top" | - Easy to use: after 15-20 litres, the upper container has to be refilled<br>
}}
===Construction, operations and maintenance===
[[Image:siphon3.png|thumb|right|200px| Siphon filter demonstration in Mozambique]]
[[Image:siphon1.png|thumb|right|200px| Principle of a siphon filter]]
The plastic parts last up to 5 years.
===Costs===
{{Treatment_Cost2
|CapCost= € 7 - 9
Figures are assuming filter replacement takes place every year but plastic parts last up to 5 years.
===Field experiences===
It is now being implemented in Tanzania, Mozambique, Madagascar, Kenya and India.
===Manuals, videos, and links===
* [[Solution_of_the_week_6|Akvo solution of the week 6]]
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===Acknowledgements===
* [https://www.diageogivingforgood.com/how_filters_work.aspx The CrystalPur filter]. World Health Works (WHW), a spin-off of EnterpriseWorks/VITA, makes the CrystalPur filter, which was introduced in response to the need for low-cost domestic water filters in developing countries.
* Safe Water Today: [http://www.safewatertoday.org/ Supporting Global Water Projects]. In partnership with the Earth Rights Institute 501(c)3.
