This is a very simple and inexpensive direct-action hand pump that I designed while living in South America. It's made entirely of materials that won't corrode - PVC pipe and fittings, rubber bicycle inner tube, a Coke bottle cap, stainless steel screws, and copper wire. There are no seals on the piston to wear out, just an annular gap, but that requires that a simple filter be used below the foot valve to keep sand out. I make the filter out of a length of PVC pipe that I perforate with many holes, then wrap it with a round or two of plastic woven feed sack material and some wire or rope to hold it on. The pump works with little effort. There are a couple of other videos I'm posting of this pump showing how it can be used. I was able to sell the kit to make the whole pump including the filter (but minus the length of PVC pipe needed to reach water, which varies) for just and I know of at least some that are still in use after more than 3 years of daily use. Because this pump is so simple and made of locally-available materials it's not difficult for people to do their own repairs. Simple, affordable, maintainable, reproducible - this is what I aim for.
Tags: hand, pump, handpump, bomba, de, agua, mano, simple, inexpensive, affordable, maintainable, reproducible, AT, appropriate, technology, tecnologia, apropiada, water, lifter
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