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One of the most popular hand pumps
today is the “Mark
II”. To produce 15 liters
of water per minute using this pump
would require 40 consecutive strokes
with 20 KG of force for each stroke
in 60 seconds. This is the level of
effort required for a 25M water depth;
the effort increases to 30 KG of force
per stroke for a 45M depth. An extremely
strong man would have great difficulty
keeping up that pace even for a short
time.
Throughout the Developing World, the
task of operating the hand pump or
fetching water usually falls to women
and children. They cannot even begin
to approach the rate of 40 strokes
per minute with the required force,
much less maintain it. If it were
even possible to keep up that rate,
with no stopping to change buckets
or to rest, one could only produce
4,500 liters in five hours of non-stop
pumping.Realistically, a hand pump
will only produce 2,500- 3,000 liters
of water per day. Human strength,
fatigue and broken down hand pumps
significantly limit the daily production
rate.
Studies in Africa have shown that,
at any given time, 30% - 60% of all
hand pumps are broken and completely
useless. Consequently, there must
be an alternative water source which
requires women and children to spend
several hours daily carrying water
to homes, schools and clinics.
Standard hand pumps can only pump
water directly into open buckets.
They are incapable of pumping water
into an elevated tank or to provide
pressure for distribution through
a central piping system to multiple
points.Water pumped into a bucket with a
hand pump may already be contaminated
with waterborne diseases and is susceptible
to being exposed to additional airborne
diseases when left in an open container.
The consumption of contaminated water
puts the entire community at risk
of dangerous, life threatening, health
consequences.
In some areas, many hours of labor
are spent daily collecting water.
Now there is a better way!
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