The answer to 'how to clean water line replacement' is to thoroughly flush and disinfect the new water line before using it. First, turn off the main water supply and open all faucets to drain the existing line. Then, use a garden hose to flush the new line with clean water for several minutes to remove any debris or contaminants. Next, mix a chlorine-based disinfectant solution and circulate it through the line for 30 minutes to an hour. Finally, flush the line again with clean water until there is no longer any chlorine smell.
It's important to take proper safety precautions when working with water lines, such as wearing gloves and eye protection. Homeowners should also consider calling a professional plumber for water line replacement or cleaning, especially if the job is complex or they are uncomfortable with the process.