What is the purpose of flushing a newly installed pipe?

• A. Remove chlorine by itself
• B. Remove high concentration of chlorine, mud and soil, other debris, and entrained air
• C. Test pipe joints for leaks
• D. Calibrate flow meters

Answer: (B)

Flushing a newly installed pipe is about cleaning the line before it serves the public. It clears out materials picked up during construction—mud, soil, and other debris—and expels entrained air from the pipe. It also helps remove an elevated chlorine residual that may be present after disinfection, bringing the water to a safer, more typical level for distribution. This process protects water quality, prevents discolored water or taste/odor problems, and reduces sediment that could result once service begins. Flushing isn’t intended to test joints or calibrate flow meters.