1-10. LOCATION ANI) DESCRIPTION OF MAJOR COMPONENTS
a Flaking Box Assembly Refer to figure 1-1 Sixty-four flaking boxes al e supplied with the TWDS Flaking
boxes aid setup and recovery of the TWDS hose line
(1) Flaking Box Used to store and lay discharge hoses I loses are flaked into the box for storage and
pulled from the box during hose line setup. Removable panels aid repacking Boxes can be
stacked to reduce storage space.
(2) Discharge Hose The TWI)S hose line is made up of 128 6-inch discharge hoses that carry water
throughout the system. Each hose is 500 feet long and has a single grooved coupling installed
on both ends Hoses are joined using coupling clamps.
b Swivel Swivels are Installed in the hose line at 1000 foot intervals to prevent damage to the hoses
caused by twisting and expansion.
c Coupling Clamps Boltless coupling clamps are used to join all grooved 6-inch hoses and components
Clamps are hinged and are supplied with a tool required for installation.
d Sling Assembly The lifting sling is supplied for lifting and movement of the flaking boxes. A stack of
four flaking boxes may be lifted atone time.
e Road Crossing Guards Installed over hose line passing under roadways. Prevents damage to hose
caused by passing vehicles and equipment Guards are installed where required.
f Suspension Kit Used to suspend hose line across streams, gullies or rough terrain.
g Displacement and Evacuation Kit. Used to remove water and air from hoses before repacking.
h Pressure Regulating Valve The skid mounted valve reduces system pressure to protect hoses and
components Valve is installed in the hose line where pressures are expected to exceed 225 psi. Three
manually operated isolation valves allow maintenance of the pressure regulating valve while installed
In the hose line
i Pumping Stations Each pumping station contains a 600 gpm pump and the required hoses, valves and
tees to connect the pump to the water system Six pump stations are supplied with the TWDS Five
stations are used during normal operation, while a sixth pump station is kept off line as a spare The
sixth station may be used to increase system capacity when operating in hilly terrain Pump stations are
installed in the hose line at two mile intervals.
(1) 600 Gpm Pumps The 600 gpm pumps are the primary source of water delivery. The pumps are
self contained, engine driven, trailer mounted and fitted with suction and discharge elbows for
connecting the hose line. Each pump draws water and feeds it to the next downline pump or
distribution point. Refer to the applicable TM for location and description of major components
on the 600 gpm pump.
(2) Check Valve In-line check valve prevents back flow of water through the 600 gpm pumps when
the pumps are shutdown.