The answer to 'how to clean water line' is to regularly flush and disinfect your water lines to remove buildup and prevent contamination. This involves shutting off the main water supply, opening faucets to drain the lines, and using a chlorine-based solution to disinfect the system. It's recommended to do this at least once a year, or more frequently if you notice any changes in water pressure, taste, or odor.
To clean your water lines, first locate the main water shut-off valve and turn it off. Next, open all the faucets in your home to allow the water to drain from the lines. Once the lines are empty, mix a solution of 1 cup of household bleach per 1 gallon of water. Use this solution to fill the water lines, then let it sit for 30 minutes to an hour. Finally, turn the main water supply back on and run the faucets until the chlorine smell dissipates.