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TM 9-2320-279-10-3
Operation Under Usual Conditions (Cont)
2-122. FILLING FOAM AGENT TANK.
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CAUTION
Do not mix different types or manufacturers brands of
foam agent in foam cells or piping. Mixing of different foam
agents (either type or manufacturer) may cause
deterioration of foam agent, improper proportioning and
poor performance in a fire situation. Mixing of Class A and
Class B foam agents may result in a chemical reaction
which can create globules, which can clog orifices and cause
system failure.
Do not spill foam agent on pressure/vacuum vents. Clean
any spilled foam agent before continuing with procedures.
If vents become blocked, pressure could build up in tanks
and may cause damage to equipment.
a. When filling foam agent tank during a non-fire situation, following
procedure is recommended:
(1)
Truck should be parked on a level surface.
(2)
Make sure all water and other contaminants have been drained from
foam tanks before filling.
(3)
Make sure FOAM TANK DRAIN valves (1) are in CLOSED position.
(4)
Unstow right rear access ladder (para 2-104).



 


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