1-8. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS - cont.
Accessory Components. Refer to figure 1-2, The following paragraphs describe major accessories
supplied with the ROWPU that are used to operate or service the unit. Couplings, tools, and chemicals are
stowed in the storage chests.
DISPENSING NOZZLE (1). Hand operated nozzle controls water now to user containers.
DISTRIBUTION PUMP (2). An electrically driven pump that draws water from the product water tanks
and distributes it through the potable water system.
PRODUCT WATER TANKS (3).
Two self erecting 3,000 gallon fabric tanks are used to store product
water produced by the ROWPU.
The tanks have an inflatable collar and are supplied with a repair kit and
cover. Refer to TM 5-5430-227-12&P/TO 37A12-1-121 for additional information on the water tanks.
BACKWASH (BRINE) WATER TANK (4). A self erecting 3,000 gallon fabric tank is used to store brine
water for use during the backwash cycle. The tank has an inflatable collar and is supplied with a repair kit
and cover. The tank must be identified and marked as the brine tank to prevent use in the product water
BACKWASH PUMP (5).
Electrically driven pump with an external strainer is used during backwash of
the multimedia filter and cleaning R.O. elements. A screen inside the strainer removes large particles from
the brine water to prevent contamination of the ROWPU.
RAW WATER PUMPS (6).
Two electrically driven water pumps draw water from the raw water source
and pump it to the unit for processing. During NBC operation., one raw water pump is used to assist water
flow through the deionization cartridges.
SUCTION STRAINER (7). Connects to the end of the raw water suction hose to prevent rocks, sand and
debris from entering the raw water pumps and the ROWPU.
FLOAT (8). Used to suspend raw water strainer off bottom of water source.
SUCTION HOSES (9).
Suction hoses are installed on the inlet (suction) side of most accessory pumps and
are used to carry water to the pumps. The suction hoses are constructed of a black, wire wound, rigid
material which prevents collapse of the hose when under suction pressure. Quick disconnect coupling ends
aid rapid assembly and disassembly of hose connections. Each hose is supplied with a cap and plug. I f
required, the 1-1/2 inch black suction hoses may be used as discharge hoses when additional hose lengths
are needed. Hoses reserved for potable water use have a blue stripe down their full length. Do not use
blue striped hoses in the raw water or backwash water systems.
DISCHARGE HOSES (10). Discharge hoses are installed on the outlet (discharge) side of the accessory
pumps and carry water, under pressure, away from the pumps. The discharge hoses are constructed of
rubber hose material covered in a white canvas. When not under pressure, the discharge hoses lay flat.
Quick disconnect coupling ends aid rapid assembly and disassembly of hose connections. Each hose is
supplied with a cap and plug. Discharge hoses reserved for potable water use have a blue stripe down their
full length. Do not use blue striped hoses in the raw water or backwash water systems or vent vessels.