The answer to a supply line overflowing is that it is typically caused by a clogged or damaged supply line. Symptoms may include water leaking or dripping from the supply line, low water pressure, or the supply line backing up and overflowing. Solutions can include clearing the clog, replacing the supply line, or tightening connections, depending on the specific issue.
For a minor clog or leak, you may be able to fix it yourself with some basic plumbing tools and skills. However, if the issue is more serious, such as a damaged or burst supply line, it's best to call a professional plumber to properly diagnose and repair the problem. Attempting complex plumbing repairs without the right expertise can lead to further damage or safety issues.