Using the hand method, what is the total pressure loss due to friction in 600 feet of 2-1/2" hose when a fog nozzle is flowing 150 gpm at 100 psi?

To determine the total pressure loss due to friction in 600 feet of 2-1/2" hose flowing at 150 gpm, using the hand method is a straightforward approach.

First, it is essential to know the typical friction loss per 100 feet of 2-1/2" hose when flowing at this particular flow rate. For a flow of 150 gpm through 2-1/2" hose, the friction loss is commonly around 4.5 psi per 100 feet.

To find the total pressure loss over 600 feet, the calculation proceeds as follows:

1. Determine how many 100-foot sections are in 600 feet:

[

600 \text{ feet} \div 100 \text{ feet} = 6 \text{ sections}

]

2. Next, multiply the friction loss per section by the number of sections:

[

4.5 \text{ psi/section} \times 6 \text{ sections} = 27 \text{ psi}

]

This systematic approach results in a total friction loss of 27 psi when water is being pumped through the hose at the specified rate. Therefore, this confirms that