F-1031, Section 2449
Page 2 of 18
WARNING
Compressed air can be dangerous. Read and under-
stand the operating instructions for the Waterous
compressed air foam unit and individual components
prior to operating.
WARNING
Discharge outlets that are capped, hose lines that are
valved and charged and the air compressor sump
may contain compressed air. Relieve all pressure be-
fore attempting to remove any caps, fittings and noz-
zles or to perform maintenance to prevent serious
personal injury.
WARNING
Operating the compressed air foam unit with water
and compressed air pumped through a discharge
without foam concentrate will create a potentially
dangerous condition known as “slug flow,” where un-
mixed pockets of water and air are passed through
the nozzle, causing erratic nozzle reaction.
CAUTION
Nozzle reaction force is significantly increased at the
time the nozzle valve is opened in compressed air
foam operations. Open CAFS nozzles slowly.
CAUTION
Do not use the compressed air foam unit as an air
source for SCBA or any breathing air supply
CAUTION
For compressed air foam operations, use only fire
hose that is rated at 200 PSI or higher working pres-
sure.
NOTICE
The unit operator should have a thorough under-
standing of “Boyle’s Law” (The law of compressed
gases) prior to operating the compressed air foam
unit.
NOTICE
When towing, disconnect the drive shaft that con-
nects the pump transmission’s rear output (coupling)
shaft to the vehicles differential. Failure to do so may
result in damage from lack of lubrication.
Safety Information
Read through the safety information and operating instructions before using your Waterous CAF System.
