Why Is My Toilet Gurgling?

Have you ever wondered why your toilet seems to gurgle as if it’s struggling to breathe? A gurgling toilet can be a cause for concern but fear not—there are several possible reasons behind this phenomenon. In this blog post, we’ll delve into the common causes of a gurgling toilet and explore the solutions that your trusted septic professional can offer. Let’s demystify the mysteries of the gurgling toilet.


Common Causes of a Gurgling Toilet:

Clog: A common reason for toilet gurgling is a clog in a sewer line inside your house. This obstruction can disrupt the smooth flow of wastewater and lead to gurgling sounds.

Belly Dip: Your home’s front line, the pipe connecting your house to the septic tank, may have a dip or belly. This dip can impede the movement of wastewater, causing gurgling. A septic company can use a camera to inspect the line and identify any bellies.

Outlet Filter: If your septic tank is equipped with an outlet (effluent) filter, it plays a crucial role in protecting your septic system from free-floating solids. However, if you use a garbage disposal or allow food down your sink, the outlet filter can become clogged. Legacy routinely cleans the outlet filter during septic tank pumping, but excessive use may require homeowner maintenance.

Inlet Pipe: An issue with the inlet pipe can also lead to toilet gurgling. It’s important to examine this component as part of your troubleshooting process.


Assessing the Water Level in Your Septic Tank:

1.To determine the cause of your gurgling toilet, you can follow these steps:

2.Have someone turn the water on inside the house.

3.Unscrew the lid on the observation port, typically a 6-inch PVC or cast-iron cap.

4.Use a flashlight to check if you can see the water entering the septic tank. If you can see the water entering, that’s good news.

5.The water level should be approximately 2 to 4 inches below the inlet pipe. If you cannot see the inlet pipe, it indicates that the tank is overfull, and an obstruction may be present in the pipe, possibly requiring excavation.


Addressing Potential Issues:

1.If you find that your septic tank is overfull, pumping the tank will provide temporary relief, but it’s essential to address the root cause.

2.If all else checks out and you continue to experience gurgling, you may have a failed absorption system (such as drain fields, drywells, sand mounds, or drip systems). This can lead to overflows or sewage surfacing in your yard. In this case, it’s advisable to have your contractor apply for a permit with your local health department to schedule a perc test and design a replacement septic system.


In conclusion, a gurgling toilet can signal underlying issues with your septic system. By understanding the possible causes and following the steps to assess your septic tank’s water level, you can take proactive measures to address the problem. For expert guidance and solutions, don’t hesitate to contact Legacy Septic. We’re here to assist you in resolving gurgling toilet concerns and ensuring the smooth operation of your septic system.