The answer to 'why is my water line making gurgling noise' is that a gurgling sound in your water line is usually caused by a blockage or obstruction in the pipe. This can be due to a buildup of debris, mineral deposits, or even a partial clog. The gurgling noise is caused by air bubbles being forced through the restricted water flow.
Some common symptoms of a gurgling water line include slow draining sinks or tubs, low water pressure, and a gurgling or bubbling sound coming from the pipes. The solution often involves clearing the blockage, either through DIY methods like using a plunger or drain snake, or by calling in a professional plumber to inspect and clear the line.