Each one has its own remedy, and we’ll plunge into the details below. · whether it happens when you flush, when you use a sink, or even when the shower is running , these noises often signal deeper issues that need attention. Here are five common causes of toilet bubbling and how to know when its time to call a professional. · running the shower may cause the toilet to bubble or gurgle. Typical reasons are a bad flapper, wrong float height, or a leaking fill valve. Most likely, there is a blockage in the sewer line or in the vent stack. · a toilet keeps running if water rushes from the tank to the bowl subsequent to a flush and does not stop. Clogged toilet or partial drain blockage. · in this article, we’ll explain why you hear toilet bubbling when the shower is running or after the water drains and break down what you can do to fix this problem. Why is your toilet bubbling when the shower is running ? The sewer main drain, the vent stack, the toilet , the sink, or the tub. It’s a sign of air pressure failure within your home’s main drainage system. · toilet bubbling and gurgling may just require a quick plunge, but can also indicate a bigger problem. Well show you how to troubleshoot a gurgling toilet. · discover why your toilet bubbles when you shower. · a bubbling toilet indicates a blockage in one of five places: This is no coincidence since the shower and the toilet share a common drain line.