Change 1 28 April 2002
OPERATOR AND UNIT MAINTENANCE MANUAL
(INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)
TANK, FABRIC, COLLAPSIBLE, WATER STORAGE,
20,000 AND 50,000 GALLONS
EQUIPMENT DESCRIPTION AND DATA
EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
Characteristics, capabilities, and features of the 20K and 50K collapsible fabric water tank assemblies
a. Easily transportable when empty and quickly sets up in the field. Primarily used in quick-response
deployment operations. Provides long life in both hot and cold climates.
b. Collapsible container designed to store potable water only. It will store water that is off-loaded from
shipping tankers or pumped from wells. When filled, the tank assumes a pillow shape with the length and
width decreasing inward from flat dimensions approximately one foot each and gaining in height four to
c. The self-erecting pillow-shaped water tank is provided with a safety vent to prevent overfilling and
quick disconnect couplings and fittings to allow for rapid connection of system water hoses.
d. Handles aid positioning and movement of empty tank.
e. Compatible with all standard military water storage and handling equipment.
f. Tank is self-supporting and does not require earth embankment support on level ground.
g. Tank is composed of a reinforcing fabric impregnated with an elastomeric coating on both sides, which
is suitable for drinking water. The tank materials are designed to resist exposure effects from extreme
temperatures, rain, snow, ice, fungi growth and high humidity conditions.
h. Five fittings are bonded into the tank for attaching a vent fitting assembly, two filler/discharge
assemblies, and two drain assemblies.
i. A vent fitting assembly is integral to the tank on top center to relieve pressure as the tank is filled.
j. Small cuts and holes easily repaired with the kit supplied.
k. All tank models are equipped with a ground cloth to protect the tank bottom from punctures.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
Refer to WP 0004 00.
DIFFERENCES BETWEEN MODELS
The 20K and 50K tank models are similar except for variations in size and weight. The 20,000 Gallon
(75,710-liter) tank has a different envelope from that of the 50,000 Gallon (189,300-liter) tank, but
functions the same and has very similar fittings. Each unit consists of an elastomeric-coated collapsible
fabric water tank with two filler/discharge assemblies with elbow fittings, a vent fitting assembly with vent
relief cap, a drain valve assembly with 8.0 foot (2.44 meter) drain hose and ball valve, a 10.0-foot (3.05
meter) filler/discharge hose assembly with ball/gate valve, a tank repair kit containing emergency repair
items, a spare parts package consisting of o-rings and gaskets, and, for Reliance and MPC tank models,
two lift slings. A separate nylon coated fabric ground cloth protects the tank bottom from punctures on all