Handpump manufacture.  Photo: Karl Erpf

RWSN has maintained international standards for the public domain handpumps since 1992 and provided extensive technical support to many national governments, NGOs and the private sector to enable decisions to be made regarding handpump standardisation, raise manufacturing standards and build skills and systems to improve handpump operation and maintenance.

 

 

 

If you have a limited internet connection, then we have a CD-ROM with all the handpump specifications and manuals - contact the Secretariat for details.

 

Application

The Rower pump was developed as a simple manually operated pump for small scale irrigation. The Rower Pump is a suction pump in which the piston is directly activated.  A surge chamber (an air vessel just downstream of the foot valve, makes the pumping op-eration is smoother). It is a simple and reliable pump with very few moving parts thus wear is reduced. It is easy to repair and main-tain The sitting position of the operator is ergonomically favourable and makes it easy to pump for prolonged periods, thus well suited for irrigation. The pump has limited use for drinking water as the spout is relatively low. Typically, Rower Pumps are installed in collapsible tube wells with the screen extending to the coarse sand aquifer.

The Tara Pump is a “Direct Action Pump for Low Lift Wells”. It uses a buoyant pump rod that helps to reduce the forces on the handle. It is not designed for heavy-duty use, and can serve small communities of 100 persons. The maximum recommended lift is 15 m. The Tara Pump is a public domain pump defined by RWSN specifications and Indian Standards. It is fully corrosion resistant and is easy to install and has excellent potential for community-based maintenance.

A pump for small scale irrigation and only limited use for drinking water.
The treadle pump was developed as a simple foot operated pump for small scale irrigation. The pump is a suction pump in which the two pistons are activated via a pedal. The extended pedal acts as a counterpoise to push the piston back. The treadle pump is a simple and reliable pump with very few moving parts thus wear is reduced. It is easy to repair and maintain The stepping movement of the operator is ergonomically favourable and makes it easy to pump for prolonged periods, thus well suited for irrigation. The pump has limited use for drinking water as the spout is at ground level. Typically, Treadle pumps are installed in collapsible tube wells with the screen extending to the coarse sand aquifer.

 The U3M Pump is a conventional lever action handpump developed in Uganda. It is designed for heavy-duty use, serving communities of up to 300 persons. The maximum recommended lift is 45 m.

The U3M Pump is a public domain pump defined by RWSN specifications. The U3M Pump is fully corrosion resistant. It is easy to install and has excellent potential for community based maintenance.

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. It is designed for heavy-duty use, serving communities of 300 persons. The maximum recommended lift is 60 m. The Vergnet pumps are fully corrosion resistant and installation of the pump is easy. Maintenance requirements are simple; above ground components allow interventions by the village caretaker, but below ground components are difficult to repair.

The Volanta Pump is a reciprocating pump for medium to very deep wells. It uses a retractable cylinder and a seal-less stainless steel piston. The stroke is adjustable to reduce the effort needed at deep installations. It is designed for heavy-duty use and the maximum recommended lift is 70 m.

The Volanta Pump is not in the public domain and information can be asked from the manufacturer. The Volanta Pump is fully corrosion resistant. It is rather difficult to install and it needs extensive masonry work. Maintenance is easy so that communities can care for the pumps.

The Walimi Pump is a conventional lever action handpump for lifting water from low to medium deep wells. It is designed for small to medium sized communities of up to 250 persons. Besides the 3” (Ø76 mm) cylinder configuration, recommended to maximum lift of 25 m, a 2” version (Ø50 mm) cylinder is used for lifts up to 40 m. The Walimi Pump is a public domain pump defined by RWSN specifications. This pump is corrosion resistant, is quite easy to install and it has very good potential for community-based maintenance.

 

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