The answer to 'how to unclog water line' is to first try using a plunger or plumber's snake to dislodge the clog. If that doesn't work, you can try using a chemical drain cleaner, but be sure to follow the instructions carefully. If the clog persists, you may need to call a professional plumber to use specialized tools and equipment to clear the line.
It's important to act quickly when you have a clogged water line, as a blockage can lead to water damage and other issues. Regular maintenance, such as periodically running a plumber's snake through the line, can help prevent clogs from forming in the first place.