b. Unroll the tank and unfold the sides. Spread out the tank with the open end up. Perform before-
operations PMCS.
c. Remove the foot bellows and inflate the collar (maximum air pressure is 0.5 PSI).
d. Remove the dust plugs from the filler and discharge fittings. Connect the gate valves on the filler
and discharge fittings. Connect a water supply line from the water purifier to the filler fitting gate valve.
Connect the water supply line from the discharge fitting gate valve to the distribution pump.
e. Place the cover (float side down) into position on top of the tank and begin filling the tank when
ready.
f. Check the tank collar and cover float for adequate inflation. Adjust the air pressure as needed.
Conduct during-operations PMCS as required.
9. Monitor the following procedures to ensure your subordinates properly supervise ONION tank operation.
Soldiers must:
a. Issue water from the tank using a distribution pump, such as the 125-GPM diesel or the 65-GPM
electric pump.
b. Check the chlorine residual of the product water every 30 minutes and prior to issue.
c. Log all issues of water on DA Form 1714-R.
10. Monitor the following procedures to insure your subordinates properly supervise ONION tank movement.
Soldiers must:
a. Remove all remaining water from the tank by opening both the filler and discharge ports. Perform
after-operations PMCS.
b. Clean and dry the tank. Fold and repack the tank into its carrier.
11. Monitor the following procedures to ensure your subordinates properly supervise ONION tank repair.
Soldiers must:
a. In emergencies, as an immediate temporary measure, use wood plugs for sealing small holes or
punctures. If a leak is not stopped with the plug, the use of a small sealing clamp may become necessary.
b. Use the sealing clamps when the size of the damaged area or opening require them. Tighten just
enough to stop the leak. If pliers are used, do not over tighten, because the stud threads may be stripped or
damage can occur to the fabric of the tank.
c. Do not patch the tank fabric if the ambient temperature is less than 60, F. Patching must be done in
an area which will remain dry and at a minimum ambient temperature of 60, F for 48 hours.
12. In arid areas where organic DS water systems are not capable of providing water supply due to the lack of
local water sources, GS units provide this capability. Purified water is introduced into the water storage and
distribution system from purification points located on and off shore. This water is stored in a PWS/DS. From
there, it is distributed to other PWS/DSs within the
QM4918
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