Young plumber near a flush toilet. Toilet bubbling.

Why Is My Toilet Bubbling? What is this gurgling sound?

Why Is My Toilet Bubbling? When your plumbing system works the way it should, it’s easy to forget all about it. But when a problem catches your attention, the plumbing becomes all you can think about until you resolve the issue. Perhaps you’re experiencing a toilet bubbling when your shower drains. In this post, Drain Doctor brings troubleshooting tips for this problem. Learn more about what makes a toilet gurgle and how to fix it.

What Causes Toilet Bubbles When the Tub Drains?

The toilet bubbling phenomenon stems from something called wet venting. Plumbing codes require all drains to be vented separately to prevent pressure build-up and to vent sewer gases outside. However, when several fixtures are so close together in the bathroom, a single vent pipe may facilitate multiple drains, including the tub, sink, and toilet.

When a drain or vent blockage occurs in this type of configuration, air may enter and exit through one fixture when you use another. This is what makes the toilet bubble or sink gargle when the bathtub drains. You may also notice that all the bathroom fixtures are slow to drain and the toilet flushes sluggishly when a blockage forms in a wet vented system.

How to Troubleshoot Air Bubbles in the Toilet Bowl

The clog causing air bubbles in the toilet may be minor or quite severe. To help you determine how serious the problem is, follow these troubleshooting tips.

Clear the shower drain

Remove the strainer and clean any hair and soap scum from it.

Plug the tub and fill it with a few inches of water. Release the plug, and as the water drains, keep an eye on the toilet. If the bubbling persists, you know the blockage is further down.

Clear the vent

The blockage could be located in the vent. The main vent stack should exit through the roof. Pay a visit there, and you may discover leaves or other debris blocking the vent.

Why Call a Professional to Fix the Situation

If these troubleshooting tips seem overwhelming, or you try them to no avail, call Drain Doctor for help. Our experienced plumbers have the right tools and knowledge to fix the problem without causing further damage. We can also locate inherent problems with your plumbing, such as an uphill drain, that may be the root cause of air bubbles in the toilet bowl.

For help unclogging your toilet or shower drain, contact Drain Doctor Plumbing today.

Posted by Drain Doctor