TM 10-4320-303-131.19.1.1 LeadPumpingStation . Draws water from desalination units, wells, or large storage and distributionunits. A Y-Connection Reducer and 6 inch by 10 foot rigid walled hose assembly connect the lead pumpingstation to the water source. The lead pumping station pumps water down line to first boost pump station. Ahose assembly connects the lead pumping station to the 10-mile hose segment. Manual operation of 6 inchbutterfly valves on the hose assemblies controls water flow into and away from lead pump. A check valve isinstalled on the discharge elbow of the pumping assembly to restrict reverse water flow. Refer to applicabletechnical manual for a functional description on the operation of the pumping assembly and location ofdischarge elbow.1.19.1.2 BoostPumpingStations. Receives water from up line hose segments. Pumps water down line tonext boost pumping station or to storage assembly. Manual operation of 6 inch butterfly valves on the hoseassemblies controls water flow into, away from, or around each boost pumping assembly. A check valve isinstalled on the discharge elbow of the pumping assembly to restrict reverse water flow into the pumpingassembly's discharge elbow. A pressure relief valve is installed between the boost pumping station and thedown line hose segment to reduce water pressure when water pressure exceeds 200 pounds per square inch(psi) when leaving the boost pumping station. Refer to applicable technical manual for a functional descriptionon the operation of the pumping assembly and location of discharge elbow.1.19.2 StorageAssembly. The storage assembly is connected to the main TWDS hoseline by a 6 inch x 6inch x 4 inch tee pipe. A series of couplers, 4 inch gate valve, and a 4 inch x 10 foot hose assembly connectthe 20,000 gallon pillow tank to the tee pipe. Each storage assembly can collect up to 20,000 gallons of watertapped from the main TWDS hoseline. The storage assembly water fill rate is controlled by manual operationof the 4 inch gate valve. Water can be stored in the storage assembly for later use or can be supplied todistribution points for dispensing to personnel. Refer to applicable technical manual for a functional descriptionof the 20,000 gallon storage assembly.1.19.3 10-MileHoselineSegment. The 10-mile hoseline segment consists of 6 inch x 500 foot collapsiblehose assemblies. The 10-mile hoseline segment transfers water to the major components of the TWDS. Thissegment is used to connect pumping stations and storage assemblies. A swivel joint is installed every 1,000feet to prevent damage and kinking of the hoseline segment during hoseline packing or pressure surges duringoperation of the TWDS. The 500 foot hose sections are stored in flaking boxes. The flaking boxes can bestacked four high and can be loaded or unloaded by either a forklift or lifting sling and crane. A skid mountedpressure- reducing valve assembly is installed where hoseline pressure is expected to exceed 225 psi, usuallyif there is an elevation drop of 75 feet or greater between pumping stations. A pressure relief valve is installedjust before the pressure reducing valve assembly to reduce water pressure when water pressure exceeds 200psi. Suspension devices are used to route the 10-mile hoseline segment over obstacles in terrain. A roadcrossing guard is used to protect hose segments from damage when the hose segments are buried under aroad bed. An end cap can be installed if dead-end service is required or the hoseline can be coupled with anadditional TWDS or distribution and storage unit.1.19.4 DistributionPoints .Each distribution point consists of a 125 GPM pumping assembly, ahypochlorination unit, a network of hoses, two stands for nozzles and elbow valves, and four water storagebags. The 125 GPM pumping assembly draws 'water from the water storage assembly and delivers it to thehypochlorination unit. The hypochlorination unit injects chlorine into the water supply to purify it for personnelconsumption. The water is then routed through the hose network to manual dispersing stations for distributionto personnel. A functional description of each functional unit comprising the distribution point is provided in thefollowing paragraphs.1.19.4.1 125GPMPumpingAssembly . The 125 GPM pumping assembly is used to extract water from the20,000 gallon storage assembly and deliver it to the hypochlorination unit. The 125 GPM pumping assembly isa skid mounted, gasoline engine driven pump which is manually controlled. Refer to applicable technicalmanual for a functional description of the 125 GPM pumping assembly.1-16
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