©Copyright Task Force Tips LLC 2015-2020
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LIZ-030 October 29, 2020 Rev13
4.2 FLUSHING DEBRIS
Debris in the water may get caught inside the nozzle. This trapped material will cause poor stream quality, shortened reach and reduced
flow. To remove debris trapped in the nozzle:
1. Shut off flow to the nozzle.
2. Unscrew baffle using the appropriately sized socket for the nozzle flow range.
A. SMALL - 1-1/8” (28mm)
B. MEDIUM - 1” (26mm)
C. LARGE - 1-1/4” (32mm)
3. Remove debris. Flow water to flush if necessary.
4. Reinstall baffle. Tighten to 30 lb-ft (40 N·m).
5.0 USE WITH FOAM
The nozzle may be used with foam solutions. Refer to fire service training by the Authority Having Jurisdiction (AHJ) for the proper use
of foam.
5.1 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 specific
information, see LIA-025 (MANUAL: Foam Attachments for TFT Nozzles).
5.2 CLEANING AFTER USE
After educting foam it is recommended that water be educted in through the concentrate hose and inlet. This will wash out foam
concentrate residue in the hose, orifice plate, and nozzle passages. If not removed, any residue may dry and adversely affect the
accuracy of proportioning.
WARNING
Large amounts or pieces of debris may be unflushable and can reduce the flow of the nozzle
resulting in an ineffective flow. In the event of a blockage, it may be necessary to retreat to a safe
area, uncouple the nozzle and remove debris.
WARNING
For Class B fires, lack of foam or interruption in the foam stream can cause a break in the foam
blanket and greatly increase the risk of injury or death. Follow procedures established by the AHJ
for the specific fuel and conditions.
WARNING
Improper use of foam or using the wrong type of foam can result in illness, injury, or damage to the
environment. Follow foam manufacturer’s instructions and fire service training as directed by the
AHJ.