Leadership

QUESTIONS and ANSWERS

Issue 12 and Volume 96.

QUESTIONS and ANSWERS Wherein are answered questions relating to current problems in Fire Protection. Pressure Calculations for Small Lines To the Editor: In laying out to a fire using 800 feet of 2 1/2-inch hose equipped with a 1 1/8-inch nozzle at 80 pounds hydrant pressure (nozzle is threaded for 1 1/2-inch hose connection) fifty feet of 1 1/2-inch hose equipped with 1/2-inch nozzle is added to the line. What is the nozzle pressure? Using the same layout except that a wye and two 50-foot lengths of 1 1/2-inch hose equipped with 1/2-inch nozzles are used, what will be the nozzle pressure at each of the 1/2-inch nozzles ? Will the nozzle connection have any hearing on the pressure other than what is shown? W. M. Answer: Where a hydrant at 80 pounds pressure is forcing water through 800 feet of 2 1/2-inch hose reduced by way of nozzle) to…

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