TM 10-4320-303-13
1.19.4.2 Hypochlorination Unit. The hypochlorination unit is used to inject chlorine into the water supply, at a
steady rate, to purify water for personnel consumption. The hypochlorination unit is skid mounted and powered
by an impulse diaphragm motor which operates on water pressure. Chlorine injection rate is controlled by
adjustment of pump stroke. Water flow rate through the hypochlorination unit is controlled by adjusting in-line
valves. After controls are initially set no further adjustment is usually required. A proper chlorine dosage will
be injected into the water regardless of water flow rate through the hypochlorination unit. The operator is
required to periodically fill the five gallon chlorine solution reservoir. Water is periodically tested at the manual
disbursing stations for chlorine content using a color comparator. Refer to applicable technical manual for a
functional description of hypochlorination units, model 1955-3 and model A-506131.
1.19.4.3 Hose Network and Manual Dispersing Stations . The hose network is used to transport water from
the 20,000 gallon water storage assembly to the 125 GPM pumping assembly, hypochlorination unit, and
manual dispersing stations. A 2 inch x 20 foot rigid walled, hose assembly directs water flow from the 20,000
gallon pillow tank to the 125 GPM pumping assembly. A 2 inch x 10 foot collapsible hose assembly directs
water flow from the 125 GPM pumping assembly to the hypochlorination unit. Water flow from the
hypochlorination unit to the manual dispersing stations is directed by a series of 2 inch x 20 foot hose
assemblies. Water flow to each of the manual disbursing stations is controlled by a 2 inch gate valve. The
hose network ends at four manual dispersing stations. Two manual dispersing stations are equipped with
nozzles and two with elbow valves. The nozzles and elbow valves are stored on a nozzle stand assembly when
not in use. All hoses in the hose network are equipped with quick-disconnect fittings to allow for rapid
installation and disassembly of the distribution point. Up to four 36 gallon water storage bags, suspended on
tripods and fitted with faucets, are used to disperse water to personnel for canteens and other small containers.
Operator is required to refill water storage bags periodically.
1.19.5 TWDS Support and Supply Kits . The TWDS is supplied with metal chests containing materials
required to construct suspension devices, repair 6 inch hoseline segments, and prepare 6 inch by 500 foot
hoseline segments for storage. The kits are detailed below. A functional description of each support and
supply kit is provided in the following paragraphs.
1.19.5.1 Suspension Kit. The suspension kit is comprised of five metal chests containing kits of materials for
constructing suspensions across streams, ponds, or gullies. Each kit contains enough rope, cable, saddles,
sheeve blocks, shackles, turnbuckles, and pickets to construct one suspension spanning 200 feet or two shorter
spans. Materials suitable for constructing tripods are not included in the kit and must be procured or fabricated
locally.
1.19.5.2 Displacement and Evacuation Kit. The displacement and evacuation kit is used to remove water
and air from the hoseline prior to packing. An air compressor is required to operate the kit. Using compressed
air as a propellent a polyurethane ball, which fits snugly within the hose, is forced through the hose. As the ball
passes through the hose it displaces the water. The ball is captured by a receiver after exiting the hose. The
hose end is then plugged and a vacuum is applied until the air within the hose is evacuated and the hose
collapses. As the hose collapses, end caps are installed to prevent the hose from expanding before it is
packed.
1.19.5.3 Hoseline Repair Kit. This kit includes enough adapters and couplings to make up to three hose
repairs on the 6 inch hose assemblies. Two hose clamps are provided to isolate hose sections while repairs are
being performed.
1-17/(1-18 Blank)
