TM 9-2330-213-14&P
5-7. WATER TANK BODY MAINTENANCE (Con't).
WARNING
NEVER work alone inside water tank. A safety rope must be secured around chest
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and under arms of person entering water tank. Opposite end of safety rope must
be held by a person stationed at the manhole opening. This will allow for quick
removal of person from water tank in the event of accident or personal injury.
An adequate air evacuation system must be used to quickly exhaust fumes from
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inside water tank. Failure to follow this warning may result in injury or death.
Personnel must wear rubber gloves, canvas sleeves, safety shoes, rubberized
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apron, and protective mask while performing abrasive cleaning operation. A
portable air filter must also be used. Failure to follow this warning may result in
injury.
Nozzle pressure must not exceed 35 psi (241 kPa). Do not hold spray nozzle on any
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one area for extended periods of time. Failure to do so may result in tank rupture
or damage and possible injury.
4.
Clean all interior surfaces of water tank (1), including baffle plates, corners, seams, drains, and outlets,
with sandblast sand. Insert sandblasting nozzle and hose into piping to remove all corrosion and scale.
Remove all traces of corrosion and old coatings.
Remove dust, dirt, and sandblasting material from water tank (1) with vacuum cleaner or other suitable
5.
equipment.
6.
Scrub interior of body with scrub brush, water, and scouring powder solution.
7.
Rinse water tank (1) repeatedly with warm water, approximately 120F (49C), to remove all traces of
soapy solution.
Install drainplug (15). Install discharge valve (para 5-6).
8.
Fill water tank (1) with water and add four gal (15 1) of liquid laundry bleach. Let stand eight hours to
9.
complete sanitation process. Drain water from tank (para 2-14).
10.
Remove drainplug (15). Remove discharge valve (para 5-6).
TA505367
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