# Head Loss Calculation in Pipe Network System

## What is the head loss due to friction in a pipe network system?

Calculate the friction loss (ft) in a pipe network system with 1,800 ft of 8-in. pipe and a pump discharge rate of 600 gpm.

## Answer:

The friction loss (ft) is most nearly 15.

When calculating the head loss due to friction in a pipe network system, we can use the formula:

**h_f = [10.44 • L • Q^(1.85)] / (C^(1.85) • D^4.8655)**

Where:

**h_f** = head loss due to friction in feet

**L** = length of pipe in feet

**Q** = flow rate of water in gallons per minute (gpm)

**C** = Hazen-Williams roughness coefficient

**D** = diameter of the pipe in inches

Given values:

**L** = 1,800 ft

**Q** = 600 gpm

**C** = 120

**D** = 8 inches

Plugging these values into the formula, we get:

**h_f = [10.44 • 1800 • 600^(1.85)] / (120^(1.85) • 8^4.8655)**

After calculation, the friction loss (ft) is approximately 15. Therefore, the correct answer is option A.