TM 10-4610-237-12
Section III. PRINCIPLES OF OPERATION
1.12 SYSTEM TECHNICAL PRINCIPLES OF OPERATION.
1.12.1 General. The 20K water distribution system (Figure 1-2) described in this manual is set up for maximum
storage and distribution. Your operating needs will determine how many of the system components must be
connected and in what configuration. Additional components are available in the accessory kit to support varying
site and operating needs. Water is supplied to the 20K system by the Tactical Water Distribution System pipeline
or other water source.
1.12.2 125 GPM Pump Connection Kit. The 125 gpm pump connection kit and related 125 gpm pump serve two
purposes. They are used to pump water from the water source as needed to fill the storage tank. The pump also
is used to pump water out of the storage tank as needed to supply the water distribution system loading stations.
Water to fill the tank is supplied to the 125 gpm pump through a pipe line or outside water source. The 125 gpm
pump draws water from the source and pumps it through the single tank connection kit to the 20K gallon tank.
Water flow between the source and the storage tank is controlled by opening and closing gate valves in both the
125 gpm pump and single tank connection kits. A check valve installed on the discharge side of the 125 gpm
pump prevents back flow of water through the pump. Refer to the applicable TM for detailed information on the
125 gpm pump.
Potable water is stored in the 20K gallon tank until needed. When water at the loading stations is required, water
flows from the storage tank, through the single tank connection kit, to the suction side of the 125 gpm pump.
Control of water flow between the storage tank and loading stations is performed by opening and closing the proper
gate valves in both the 125 gpm pump and single tank connection kits. The 125 gpm pump supplies water on
demand and at a rate determined by the discharge hose and nozzles at the loading stations.
Water discharging from the 125 gpm pump for supply to the loading stations is treated with a hypochlorite solution
by the hypochlorination unit. The solution is injected into the water supply based on the water flow rate. The water
supply must be tested and the hypochlorination unit adjusted to provide the correct ratio of hypochlorite solution as
required by medical personnel. Refer to the applicable TM for additional information on the hypochlorination unit.
1.12.3 Single Tank Connection Kit. Water flows into and from the storage tank through the single tank connection
kit. Water flow into the storage tank is controlled by opening or closing the proper gate valves on the inlet (fill) side
of the single tank connection kit. Water is stored in the tank until needed, then the proper gate valves on the
discharge side of the single tank connection kit are opened or closed to allow the water to be pumped from the
tank, through the 125 gpm pump connection kit and hypochlorination unit, to the hose and hose nozzle kit loading
stations.
1.12.4 Loading Stations (Hose and Hose Nozzle Kits). Loading stations dispense water to field users through
quick disconnect discharge hoses or distribution nozzles. Water flow through the loading stations is controlled by
hand operated gate valves and/or distribution nozzles.
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