If your toilet bubbles when no one is using it, does that freak you out? Some might imagine that there is some type of sewer animal coming up the pipes, but this is most likely not the case. Instead, it indicates that there is a problem with your plumbing system.

There might be a major blockage in your plumbing. The reason for the bubbling is a simple matter of physics. When anything goes down the sewer pipes it displaces gas that is inside the pipes. This gas will need to go somewhere. Usually, it will go out the vent pipe that is connected to your plumbing system, but with that being blocked, the gas will find the easiest way out, which often will prove to be your toilet.

A blocked vent pipe will cause all your drains to go slower as well, and the sewer gas that comes out is actually harmful to your health when exposed to it for a longer time, so it is important to fix this problem. It might require the help of a plumber, since the vent pipe could be difficult to access.

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