TM 10-4320-303-13
1.19.1.1 Lead Pumping Station . Draws water from desalination units, wells, or large storage and distribution
units. A Y-Connection Reducer and 6 inch by 10 foot rigid walled hose assembly connect the lead pumping
station to the water source. The lead pumping station pumps water down line to first boost pump station. A
hose assembly connects the lead pumping station to the 10-mile hose segment. Manual operation of 6 inch
butterfly valves on the hose assemblies controls water flow into and away from lead pump. A check valve is
installed on the discharge elbow of the pumping assembly to restrict reverse water flow. Refer to applicable
technical manual for a functional description on the operation of the pumping assembly and location of
discharge elbow.
1.19.1.2 Boost Pumping Stations. Receives water from up line hose segments. Pumps water down line to
next boost pumping station or to storage assembly. Manual operation of 6 inch butterfly valves on the hose
assemblies controls water flow into, away from, or around each boost pumping assembly. A check valve is
installed on the discharge elbow of the pumping assembly to restrict reverse water flow into the pumping
assembly's discharge elbow. A pressure relief valve is installed between the boost pumping station and the
down 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 description
on the operation of the pumping assembly and location of discharge elbow.
1.19.2 Storage Assembly. The storage assembly is connected to the main TWDS hoseline by a 6 inch x 6
inch x 4 inch tee pipe. A series of couplers, 4 inch gate valve, and a 4 inch x 10 foot hose assembly connect
the 20,000 gallon pillow tank to the tee pipe. Each storage assembly can collect up to 20,000 gallons of water
tapped from the main TWDS hoseline. The storage assembly water fill rate is controlled by manual operation
of the 4 inch gate valve. Water can be stored in the storage assembly for later use or can be supplied to
distribution points for dispensing to personnel. Refer to applicable technical manual for a functional description
of the 20,000 gallon storage assembly.
1.19.3 10-Mile Hoseline Segment. The 10-mile hoseline segment consists of 6 inch x 500 foot collapsible
hose assemblies. The 10-mile hoseline segment transfers water to the major components of the TWDS. This
segment is used to connect pumping stations and storage assemblies. A swivel joint is installed every 1,000
feet to prevent damage and kinking of the hoseline segment during hoseline packing or pressure surges during
operation of the TWDS. The 500 foot hose sections are stored in flaking boxes. The flaking boxes can be
stacked four high and can be loaded or unloaded by either a forklift or lifting sling and crane. A skid mounted
pressure- reducing valve assembly is installed where hoseline pressure is expected to exceed 225 psi, usually
if there is an elevation drop of 75 feet or greater between pumping stations. A pressure relief valve is installed
just before the pressure reducing valve assembly to reduce water pressure when water pressure exceeds 200
psi. Suspension devices are used to route the 10-mile hoseline segment over obstacles in terrain. A road
crossing guard is used to protect hose segments from damage when the hose segments are buried under a
road bed. An end cap can be installed if dead-end service is required or the hoseline can be coupled with an
additional TWDS or distribution and storage unit.
1.19.4 Distribution Points . Each distribution point consists of a 125 GPM pumping assembly, a
hypochlorination unit, a network of hoses, two stands for nozzles and elbow valves, and four water storage
bags. The 125 GPM pumping assembly draws 'water from the water storage assembly and delivers it to the
hypochlorination unit. The hypochlorination unit injects chlorine into the water supply to purify it for personnel
consumption. The water is then routed through the hose network to manual dispersing stations for distribution
to personnel. A functional description of each functional unit comprising the distribution point is provided in the
following paragraphs.
1.19.4.1 125 GPM Pumping Assembly . The 125 GPM pumping assembly is used to extract water from the
20,000 gallon storage assembly and deliver it to the hypochlorination unit. The 125 GPM pumping assembly is
a skid mounted, gasoline engine driven pump which is manually controlled. Refer to applicable technical
manual for a functional description of the 125 GPM pumping assembly.
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