TB 001 - Exploring the Use of 1-Inch Hose in Firefighting

Question 1

Both _____ & _____ hose wagons were used.

Answer 1

Mack & Crown

Question 2

The Objective (#1)

Answer 2

To explore the effectiveness of the “indirect” method of applying water on a fire, as opposed to the conventional method of applying water directly to the seat of the fire.

Question 3

The Objective (#2)

Answer 3

To determine the maximum effectiveness of 1 inch high pressure hose lines by going beyond their conventional limitations.

Question 4

Plan of Attack #3 - line and nozzle used

Answer 4

Use a 1 inch mystery nozzle in conjunction with a shut-off butt in order to maintain a constant pre-set spray cone.

Question 5

The 3 Pump Pressures Used

Answer 5

Three pump pressures were used: 125, 250, and 400 pounds per square inch. A rough estimate of the GPM discharge would be 25, 35, and 45 respectively.

Question 6

Trail 1 - 125 PSI at 30 Degree Fog

Answer 6

The main body of fire was knocked down in 9 seconds without ventilating the fire area.

Question 7

Trail 2 - 250 PSI at 30 Degree Fog

Answer 7

In 10 seconds the main body of fire in both rooms was knocked down.

Question 8

Trail 3 - 400 PSI at 30 Degree Fog

Answer 8

The wide-angle spray was directed in the window and it limited the room fire, but could not check the spread into the attic reducing the cone angle increased penetration, but had little effect on the attic fire.

Question 9

Conclusion

Answer 9

The indirect application of water is practical at 125 psi engine pressure, but the efficiency is increased with higher pressures.