[[Image:vergnet pump.jpg|thumb|right|250px200px|This pump is operated by foot pedal while the handle is held for balance. Photo: [http://www.rural-water-supply.net/en/implementation/handpump-overview/vergnet-hydro-hpv60-hpv100 RWSN.]]]__NOTOC__<small-title />
The Hydropump '''HPV60 & HPV 100''' are operated by foot with a pedal. The piston movement is hydraulically transmitted via a flexible hose to a rubber diaphragm down in the pumping element. The expansion and the contraction of the diaphragm deliver the water to the surface. The top cylinder is connected to the pumping element on the bottom, via a flexible hose.
The Hydropump is not in the public domain. For specific information, it is necessary to contact the manufacturer.
===Suitable conditions===
Distribution: More than 100,000 pumps, mainly in West Africa.
Supplier: Vergnet SA, France.
===Construction, operations and maintenance===
Pump stand is made of galvanized steel painted, foot pedal of mild steel, pipes of flexible LDPE hose, top and bottom cylinder of stainless steel, pumping element of a rubber diaphragm and valves of brass. This pump is corrosion resistant.
The replacement of a diaphragm is expensive. The pump requires a considerable effort to operate. Although full body weight can be applied to the pedal, children and small users find it sometimes hard to operate the pump. If the yield of the borehole allows and the water demand is high, 2 pumps in one borehole can be installed.
===Acknowledgements===
* [http://www.rural-water-supply.net/en/implementation/proprietary-handpumps/vergnet-hydro-hpv60-hpv100 Implementation • Handpump Technology Vergnet Hydro HPV60 / HPV100.] RWSN.
