MIL-PRF-53068B
tank and components shall be suitable for operational use at ambient temperatures from 32 to
125 °F. The tank shall be capable of holding a minimum of 160 gallons of water and not be
damaged when exposed to fungus growth or relative humidity up to 100 percent such as is
encountered in tropical climates. The tank shall be suitable for use in continuous contact with
rainwater, and ground water (see 4.5.3.5). There shall be no evidence of leakage or seepage
when the tank is filled to its rated capacity (+10%, -0%) with water (see 4.5.3.9). The tank shall
be capable of withstanding an internal air pressure of 0.50 psi without evidence of leakage
(see 4.5.3.2).
3.5.2 Weight and dimensions. The tank, when filled, shall be no more than 75 inches
long, 42 inches wide, and 24 inches in height (see 4.5.2 and 4.5.3.6). The tank and accessories
shall weigh less than 1500 lbs when full and require less than 5 cubic feet of storage space when
empty (see 4.5.3.1).
3.5.3 Transportability and mobility. The empty tank must be capable of being carried by
no more than two soldiers. When full, it must be transportable in a high mobility multi-purpose
wheeled vehicle (HMMWV), 0.75 ton cargo trailer, or larger vehicle, and must be capable of
being sling loaded under existing cargo helicopters. The tank shall be equipped with a tiedown
assembly to enable it to be secured when transported in these vehicles and shall not degrade the
safe operation of these vehicles. The tank when transported in these vehicles shall be capable of
travel over smooth, hard surface primary roads at sustained speeds of up to 55 miles per hour
(mph) (see 4.5.3.7). The tank shall be capable of travel over unimproved roads and open, rolling,
and hilly cross-country terrain at speeds of up to 30 mph (see 4.5.3.8).
3.5.4 Operational capability. The tank will operate by gravity flow when ground,
vehicle, or trailer mounted. It shall be equipped with a pressure relief valve to vent air during fill
operations. The tank will be issued with the associated hoses and nozzles which shall use
standard cam-lock fittings.
3.5.5 Storage and service life. The tank shall have a storage life of at least 10 years. The
service life shall be a minimum of 2 years which is based on the assumption of 200 days per year
of operation, 3 trips per day.
3.5.6 Climatic design types. The tank shall be capable of operating in the basic hot and
cold climatic categories. Thermal protection may be required during cold weather operations.
3.5.7 Nuclear, Biological, and Chemical (NBC) contamination survivability and
decontamination. The tank shall be capable of resisting penetration of chemical agents and must
be capable of being decontaminated by Super Tropical Bleach (60% calcium hypochlorite
solution) (see 4.5.3.21.1 through 4.5.3.21.4).
3.5.8 Compatibility with existing systems. The tank will be compatible with the existing
Forward Area Water Point Supply System (FAWPSS), 125 gallons per minute (gpm) pump, and
the standard water hoses and connections currently in the inventory.
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