This technical brief is aimed at sharing the learning and approaches developed by the UPGro Hidden Crisis Research Project to look at how the functionality and performance levels of boreholes equipped with handpumps (HPBs), can be assessed using a common set of definitions and methods. A tiered approach to defining and measuring functionality is found to be useful to examining functionality for different scales and purposes of monitoring. This report is aimed at national and regional actors involved in the provision and monitoring of rural water supply functionality.
The brief sets out the tiered functionality definitions, and accompanying survey methods, which were developed by the project and have been applied in functionality surveys across Ethiopia, Uganda and Malawi. | »
The 54mm open top cylinder model using PVC socket unions as 63mm PVC rising main connectors and 12mm stainless steel pump rods.
This report presents a series of backyard trials conducted by Peter Morgan which emphasise the importance of matching the borehole drilling, casing and hand pump for the Zimbabwe Bush Pump. | »
Los miembros del RWSN reciben un boletín electrónico trimestral, disponible en inglés y francés. La secretaría de la RWSN está tratando de poner este recurso a disposición de sus miembros de habla hispana. Si desea recibir noticias del RWSN en español, envíenos un correo electrónico a email@example.com con el título Noticias en español. | »
Rural water supplies in sub-Saharan Africa, particularly those relying on handpumps, often demonstrate low levels of sustainability. This book is designed to assist those responsible for planning, implementing and supporting rural water supply programmes to increase sustainability. Its primary aims are to raise awareness of issues that affect sustainability and the interrelationship between them, provide options for addressing these using examples, and describe how these options can be implemented. The importance of a programmatic approach to the delivery of rural water services is emphasized, as is the need for ongoing institutional support for community management and consideration of alternative management models. The book does not prescribe a 'one size fits all' solution but encourages a flexible, holistic approach to decision-making to achieve sustainable outcomes. | »
The history and development of the Zimbabwe Bush Pump is well recorded in numerous documents (see aquamor.info). It has been the Standard National Hand Pump option for the country since 1933 and has passed through a number of technical developments since that time.
Currently over half the estimated 50 000+ Bush Pumps placed in the rural areas within Zimbabwe are out of action. This is a combination of technical, economic and other problems faced by the country at this time. This report attempts to make suggestion which address the technical problems. Most of these technical problems are found in “down-the-hole" equipment of the pump. Standard down-the-hole equipment includes 50mm GI pipe as the rising main, a 600mm long 75mm brass cylinder with matching piston equipped with two leather seals, a heavy duty brass foot valve and mild steel 16mm pump rods.
This report discusses small modifications of current standard down-the-hole equipment, namely 50mm GI rising main, 75mm cylinder and heavy duty foot valve and 16mm steel pump rods. Minor refinements are made to the design or method of installation which have the potential to overcome many of the “down-the-hole” problems. The use of GI pipe has been retained partly because there is no other rising main option available which can cope with the wide range of depths which the Bush Pump operates in (3m to 100m). It is known that aggressive ground water occurs in some parts of Zimbabwe, and this can cause problems with corrosion in both the rising main and rods. But overall the problem of corrosion is not so large as to require a major shift away from the standard equipment. | »