Use With Foam; Foam Aspirating Attachments; Use Of Nozzles; Approvals - Task Force Tips ThunderFog Series Manual

6.0 USE WITH FOAM

The nozzle may be used with foam solutions. Refer to fi re service training for the proper use of foam.
For Class B fi res, lack of foam or interruption in the foam stream can cause a break in the foam
WARNING
blanket and greatly increase the risk of injury or death. Follow procedures established by the AHJ
for the specifi c fuel and conditions.
Improper use of foam or using the wrong type of foam can result in illness, injury, or damage to
WARNING
the environment. Follow foam manufacturer's instructions and fi re service training as directed by
the AHJ.
Use of compressed air foam (CAF) with hand held nozzles can cause sudden surges in nozzle
WARNING
reaction force resulting in risk of injury or death from loss of footing or hose whipping. Be prepared
for sudden changes in nozzle reaction caused by:

6.1 FOAM ASPIRATING ATTACHMENTS

Multi-expansion or low expansion aspirating attachments may be used with nozzles to increase the expansion ratio. These foam
tubes attach and detach quickly from the nozzle. As expansion ratio is increased, the reach of the nozzle will decrease due to the
greater amount of bubbles in the stream and their ability to penetrate the air. Generally, the straight stream reach with foam is
approximately 10% less than with water only. Actual results will vary based on brand of foam, hardness of water, temperature, etc.
For specifi c information, see LIA-025 (MANUAL: Foam Attachments for TFT Nozzles).

7.0 USE OF NOZZLES

IT IS THE RESPONSIBILITY OF THE INDIVIDUAL FIRE DEPARTMENT OR AGENCY TO DETERMINE PHYSICAL CAPABILITIES
AND SUITABILITY FOR AN INDIVIDUAL'S USE OF THIS EQUIPMENT.
Many factors contribute to the extinguishment of a fi re. Among the most important is delivering water at a fl ow rate suffi cient to absorb
heat faster than it is being generated. The fl ow rate depends largely on the pump discharge pressure and hose friction loss. It can be
calculated using a hydraulic equation such as:
PDP = NP+FL+DL+EL
PDP = Pump discharge pressure in PSI
NP = Nozzle pressure in PSI
FL = Hose friction loss in PSI
DL = Device loss in PSI
EL = Elevation loss in PSI

8.0 APPROVALS

Many nozzle confi gurations carry the FM Approval rating, NFPA certifi cation, and/or EN certifi cation.
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• Slug loading (Loss of foam concentrate sends slugs of air and water into the nozzle)
• Sudden release of built-up pressure in the hose when opening a nozzle
This Safety Manual is not intended as a substitute for proper training in
the use of rescue systems as taught from credible sources such as the
National Fire Protection Association (NFPA), the International Fire Service
Training Association (IFSTA), or sources approved by the Authority Having
Jurisdiction (AHJ).
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LKF-100 January 22, 2020 Rev20