TM 10-4320-346-12&PSection III. PRINCIPLES OF OPERATION1-12. THEORY OF OPERATIONS. The forward area water point supply system comprises a number of separate majorcomponents to store and dispense potable water. The principles of operation of each of these major components andhow they work within the system are defined in the following paragraphs. (Refer to Figure 1-2.)a.PotableWaterStorageSystem. The FAWPSS uses two 500 gallon collapsible storage drums to store thepotable water used in the FAWPSS. A typical layout of the FAWPSS is shown in Figure 1-2. Each of the collapsiblefabric drums are equipped with an adapter assembly that allows the tank to connect to the other piping components ofthe FAWPSS.b.Pump. The 125 gpm centrifugal pump and engine assembly is used to move potable water from the collapsibledrums to the four nozzles located at the four water distribution points.c.BallValveAssemblies. Two 2.00 ball valve assemblies are placed between each of the collapsible storagedrums and the pump and engine assembly. These valve assemblies are used to select which of the storage drums willbe used for potable water distribution. Water may be drawn from both drums at the same time by opening both valves orthe valves may be set to draw from one drum by closing the valves on one side of the system. This allows for thechanging of drums for repair or refill.d.NozzleAssemblies. When the pump and engine assembly is operating and the ball valve assemblies havebeen properly opened to allow potable water to be pumped from the selected storage tank, the nozzle assemblies locatedat 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, valvesand components together.1-6
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