The answer to 'water line replacement making noise' is that a new water line replacement can sometimes make noise due to a few common causes. This is often a normal part of the installation process and not necessarily a sign of a problem.
The most common causes of noise with a new water line are water pressure fluctuations, air pockets in the line, or the pipes rubbing against other surfaces. These issues typically resolve themselves within a few days to a week as the system settles. However, if the noise persists or gets worse, it may indicate a more serious problem that requires professional attention.