TM 10-4320-303-13
2.5.1 TWDS General Operating Procedures. (Continued)
allow air trapped inside hoseline to be vented as water column moves forward.
(2) Notify operator(s) on lead pumping station to begin pump operation.
(3) Observe hoseline for visual indications of approaching water. Listen for air escaping from
petcock.
(4) Close petcock on discharge elbow when water begins to flow out of petcock.
(5) Notify operator(s) on lead pumping station to shut down pump operation.
(6) Close butterfly valve on boost pump discharge hose to contain water column.
c. Begin moving water again when next downline station is installed and connected by hoseline. Open
butterfly valve on boost pump discharge hose and repeat applicable steps above. Refer to
applicable technical manual and start up lead pump and first boost pump. When water column
reaches second boost pumping station, refer to applicable technical manual and close petcock on
discharge elbow, shut down pumps, and cease operation of system. Close butterfly valve on second
boost pump discharge hose to contain water column.
d. Continue packing hoseline as each boost pumping station is installed and connected.
NOTE
Before storage tanks are filled, or complete operation of system begins, flush
hoseline of sediment and debris.
e. To protect hose from damage in high winds, do not begin filling storage tanks until hoseline is packed.
When system is ready for operation, reference paragraph 2.5.4 for instructions on filling storage
tanks.
f. Complete operation of TWDS can begin as soon as all pumping stations, storage assemblies, and
distribution points have been installed and connected.
g. During startup of the complete system, run all pumps in manual or electric mode, reference
applicable technical manual. After startup, boost pumping stations can be operated in electric
automatic mode, reference applicable technical manual. However, the lead pump should always be
operated in manual mode, reference applicable technical manual for operation of 600 GPM pumping
assemblies.
h. When 20,000 gallon pillow tanks are approaching maximum holding capacity, reduce speed on lead
pump to decrease rate of downline water flow, reference applicable technical manual. If operating in
electric mode, rate of boost pumps should decrease automatically. When 20,000 gallon pillow tanks
are filled to maximum capacity (height of tank reaches 5-1/2 feet), close 4 inch gate valve on each
storage assembly.
i. Operation of distribution points can begin when storage tanks contain enough water to allow a normal
discharge rate, para 2.5.5. Pumping rates during operation will vary, depending on amount of water
being discharged at either distribution points, large storage and distribution units, or both. Pumping
stations operate at intervals long enough to refill 20,000 gallon pillow tanks if discharge rate is
minimal. When water is pumped on a continual basis and boost pumping stations are operating in
electric automatic mode, perform DURING (D) PMCS on trailer-mounted pump assemblies at a
minimum of every 3 hours.
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