All EMAS handpump designs use glass marbles and standard PVC pipes and fittings as return valves. Different pump designs are available for high pressure, high quantity, hand-powered, pedal-powered, and windmill powered.
This is the standard EMAS hand pump design, using only PVC pipes.
All movies are available in full length at http://vimeo.com/channels/emas. More info at http://www.emas-international.de
Published in cooperation with http://www.akvo.org. For more low-cost water and sanitation solutions, visit http://www.akvopedia.org.
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