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U3M pump

596 bytes added, 19:52, 20 October 2012
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* Deep well CBMS hand pump-model U3 (US 403:2002)
* Deep well hand pump (US 471:2002)
 
====History====
The U2 and U3 handpumps use Galvanised Iron (GI) riser pipes and rods and have experienced widespread corrosion problems due to aggressive groundwater. The U3M was later modified to use uPVC pipes and SS rods. Recent problems with breaking plastic foot-valves for the U3M led to the introduction of some brass foot-valves. Due to the different versions of the U-series pumps there is now some degree of non-uniformity and uncertainties over spare part supply. However, the widespread familiarity with these models and in-country availability of spares are positive developments.
==Suitable conditions==
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