5 Possible Reasons Why My Toilet is Bubbling
When you move that little silver handle down, you want your toilet to do two things, flush and refill. Thatโs the normal process, but occasionally your toilet might do something else: For no apparent reason, it might start bubbling and emitting a gurgling sound.ย
In that case, youโre left wondering, why is my toilet bubbling?ย
There are several possible causes for the bubbling that weโll try to explain, along with a few possible DIY solutions. Here are five possible reasons youโre experiencing a bubbling or gurgling toilet:

1. Clogged Toilet
Any number of things can cause your toilet to clog, from using too much toilet paper to trying to flush things that never should be flushed, to begin with.ย
Solution – If the clog is near the surface, you may be able to clear it with a plunger. For high pressure and a maximum effect, use duct tape to seal off other bathroom fixtures, and then plunge the toilet through 10-15 pumping motions. If that doesnโt work, you might want to buy a snake or a plumberโs auger to clear the clog. If none of that works, give us a call and weโll help you out.
2. Problems in the Tank
When you remove the tank cover, you see a flapper whose job is to flush and refill the tank with fresh water. A damaged flapper may be the source of the bubbling issue.
Solution – If the flapperโs not working properly, you can buy replacement parts at a hardware store, and itโs really a pretty simple fix. If you donโt have the time or donโt like DIY repair work, a plumber can easily fix it for you.
3. Blocked Vent Stack
The vent stack is the vertical pipe extending out through your roof that releases exhaust gas and helps control the air pressure in your plumbing system. It may become clogged with leaves and other debris, by a bird nest, or possibly a small rodent thatโs died in the pipe. In addition to a bubbling toilet, a gassy smell in your house is another symptom of a blocked vent stack.
Solution: Since the vent stack is on your roof, and climbing on a roof is potentially dangerous if youโre not trained to do it, we strongly recommend calling in professionals to clear out the blocked vent stack for you.
4. Clogged Main Line
The main line drains all the wastewater from all your homeโs fixtures to the main city line. When you flush one toilet and another toilet in the house starts bubbling, or when you flush a toilet and water backs up in the shower, those are pretty good indicators your main line is clogged.
Solution – You probably donโt have the equipment or experience to handle this job. Youโll need to call a plumber that specializes in drain unblocking to clear the main line for you.
5. Clogged City Line
If youโre having bubbling and backup problems throughout the house, thereโs a good chance there is a major problem with the main sewer line serving your neighborhood. One way to check is to ask your neighbors if theyโre having the same problem, and if they are, chances are the city line is the source of the problem.
Solution – Thereโs really nothing you can do to fix the problem, and it isnโt your responsibility anyhow. Itโs the problem of your utility provider – or your city government – and they should be contacted immediately about the problem.
Expert Plumbing Solutions from Wilburโs Air Conditioning, Heating & Plumbing
From bubbling toilets in Birmingham to sewer lines that need a thorough drain cleaning in Hoover, the experts at Wilburโs can do it all for you. We are family-owned, and for over 45 years weโve served the greater Birmingham area with expert plumbing services.ย ย
All our technicians are licensed, certified, bonded, and insured, and theyโre available 24/7 to handle any plumbing emergencies that might occur in either your home or business.ย
So, when your toilet starts bubbling or you have some other plumbing issues, call Wilburโs Air Conditioning Heating Plumbing at (205) 655-2396, and our expert technicians will be right over!
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