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®
PAUL
station
manual
3 Before the assembly
3.1 Considerations on the raw water source
In general, it is recommended to use the best available water source.
not able to desalinate or detox salty or toxic waters, as is also mentioned on the
device.
Thus, which water can be used?
Usually, stored rainwater, e.g. in cisterns or reservoirs is the best raw wa-
ter source, as there is little or no contamination from industry, farming or
geogenic origin.
Also, rivers can be a good source, provided there is no influence of industry
or farming upstream
If – usually due to lack of water in sufficient quantity – wells have to be
drilkled, this water may also be of very good quality. However, it is a mini-
mum requirement to check concerning heavy metals, arsenic and fluoride,
at least as a grab sample. Also the concentration on iron and manganese
should be analyzed.
Advice can be given upon request.
3.2 Water supply for the Raw Water Tank
It has to be considered how the RWT can be fed with raw water. This will usu-
ally be done by an electric pump. Energy might be supplied by local grid or by
solar power. Of course, the pump must fit to the type of energy supply.
Whatever solution is appropriate and feasible under the local circumstances, it
should be assured that filling the RWT can operate fully unattended without
overfilling the RWT.
In case of electric pumps, a float switch that breaks the electric circuit for the
pump when exceeding a set water level in the RWT can also be provided, the
so called OPS, see chapter 2.
When selecting the pump, important criteria include
Suction or submerged pump
PAUL Station Manual 2019-08-02
www.waterbackpack.org
page 5
®
PAUL
is
02.08.2019
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