TM 10-4320-346-12&P
Section III. PRINCIPLES OF OPERATION
1-12. THEORY OF OPERATIONS. The forward area water point supply system comprises a number of separate major
components to store and dispense potable water. The principles of operation of each of these major components and
how they work within the system are defined in the following paragraphs. (Refer to Figure 1-2.)
a.
Potable Water Storage System. The FAWPSS uses two 500 gallon collapsible storage drums to store the
potable water used in the FAWPSS. A typical layout of the FAWPSS is shown in Figure 1-2. Each of the collapsible
fabric drums are equipped with an adapter assembly that allows the tank to connect to the other piping components of
the FAWPSS.
b.
Pump. The 125 gpm centrifugal pump and engine assembly is used to move potable water from the collapsible
drums to the four nozzles located at the four water distribution points.
c.
Ball Valve Assemblies. Two 2.00 ball valve assemblies are placed between each of the collapsible storage
drums and the pump and engine assembly. These valve assemblies are used to select which of the storage drums will
be used for potable water distribution. Water may be drawn from both drums at the same time by opening both valves or
the valves may be set to draw from one drum by closing the valves on one side of the system. This allows for the
changing of drums for repair or refill.
d.
Nozzle Assemblies. When the pump and engine assembly is operating and the ball valve assemblies have
been properly opened to allow potable water to be pumped from the selected storage tank, the nozzle assemblies located
at each of the four distribution points is then used to dispense potable water into suitable receiving containers.
e.
Fittings. Several different types of fitting assemblies are also used in the FAWPSS to connect hoses, valves
and components together.
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