Why Does My Toilet Bubble When the Shower Is Running?
The first time it happened, no one really thought about it.
Someone was showering upstairs when a strange sound came from the bathroom.
First came a bubbly sound from the toilet, and then another.
The owner of the home in Nampa heard the noises from the hallway and walked into the bathroom, assuming he would find someone sitting on the toilet.
There was no one there, however, and the toilet appeared to be in good condition.
It was completely full of water, but the level was not rising.
It didn’t look like anything was happening, and the man left the room.
A few days later, it happened again.
This time, the owner’s wife was showering, and he stood next to the toilet, watching.
He saw the water in the bowl ripple slightly before noticing more bubbles.
“That’s strange,” the owner said.
By the end of the week, he noticed something else.
The same sound happened when his washing machine was draining.
At this point, it didn’t seem entirely random.
A toilet that sounds like it is bubbling or gurgling when someone is using another plumbing fixture can have a variety of potential reasons.
The most important thing is to remember that the issue might not be with the toilet itself.
It might be normal for the toilet to appear to be working correctly when you sit down to use it, but other factors might be impacting it.
If your toilet is bubbling when someone is showering, A+ Drain Cleaning and Plumbing can help.
The Toilet May Not Be the Problem
This might be the first surprising discovery.
You suspect there is something wrong with the toilet because you hear strange noises coming from it, but that may not be the case.
To put it another way, think about the timing of the toilet bubbling.
If the toilet is fine for hours at a time but creates strange sounds whenever someone takes a shower, it is reasonable to believe there may be an issue.
The shower is the cause of the sound.
In this case, it can help to think of the toilet as complaining about the shower.
One homeowner put it that way, in fact, and it wasn’t far from the truth.
The toilet may not be the problem.
Rather, it could be that you have a strange sound that occurs elsewhere in your home’s plumbing system, and the toilet is just the most noticeable part of the issue.
Plumbing Has to Move More Than Water
Drains typically move water.
That much is obvious, but one of the biggest reasons plumbing can create strange sounds relates to something else entirely: air.
In short, the movement of water changes the air pressure within the plumbing system, and the right circumstances can cause unusual noises to develop.
Your drains and sewer lines are designed to allow those changes in pressure to occur, but they can become problematic if something is restricting the water flow or the movement of air.
Most of the time, you won’t hear much besides the sound of the shower or toilet flushing.
That changes, however, when there is an issue.
Sometimes it can be easy to tell what is causing the problem, but other times the most noticeable symptom is a toilet bubbling like it has been swallowed an entire bottle of carbonated drinks.
One Strange Sound Isn’t Always a Problem
Strange sounds can come from nearly anywhere in your home.
Plumbing isn’t the only culprit.
For example, it is relatively common for homes to have some strange creaking sounds as part of the natural expansion and contraction of wood flooring.
Water heaters can also make strange noises, but a single odd sound is not always something to worry about.
The same rule applies to toilets, but it can help to understand when a single strange sound might be a symptom of something even bigger.
A few weeks later, the toilet bubbles again.
It happens every morning, right after someone takes a shower.
Or maybe it occurs any time the washing machine is draining.
If the pattern repeats, it might be a sign that something is changing within your plumbing system.
It might also help to keep track of any other strange occurrences, such as a bathroom sink that is suddenly slowing down.
You don’t need to identify the exact cause, only that similar events seem to be happening at the same time, and that is when you should investigate.
A simple observation about strange noises can lead to the discovery of something much bigger.
Showers Can Move a Surprising Amount of Water
A shower is a simple part of most homes, but it also has one important characteristic: it can move a surprising amount of water.
Think about how much water would flow down the drain during a ten or fifteen minute shower.
If the flow rate is quick and steady, it shouldn’t be much of an issue.
On the other hand, if there is a restriction of some kind, it can cause restrictions to occur further down the drain.
This might explain why homeowners hear strange noises when showering, and it can also play a role in issues that develop later.
The restriction might not be a large one, but it could be enough to cause strange sounds or cause your toilet to fill more slowly than usual.
It might also be the cause of a slow drain that only appears intermittently.
It isn’t always easy to notice when something is becoming a problem, but it is important to understand how it can lead to additional issues.
…As Can the Shower Drain Slowly
The next step is frequently obvious, even if it takes some time.
At first, the only issue is the strange sound coming from the toilet, but a few weeks or even months later, the shower is no longer draining as quickly.
It might not be a major issue on its own, only taking an extra minute or two to empty, but it is an additional change that is worth noting.
These two issues can frequently appear together, so it is critical to think about them at the same time.
A slow drain on its own can frequently be caused by something as simple as hair that has been trapped in the sewer line.
The same rule applies to strange noises coming from the toilet, but both issues together can indicate a much bigger problem.
The Washing Machine Can Play a Surprising Role Too
Some homeowners have said something similar to the following:
“The toilet only does it when we do laundry.”
At first, it might not seem connected, but washing machines can play a large role in plumbing issues.
When the washing machine begins to release the water it has been holding, it does so forcefully and for a brief period of time.
That is an important difference, and if there is a restriction within the plumbing system, the effect can be noticeable.
The toilet can bubble and gurgle loudly, and the drain might even appear to move water backward, at least momentarily.
When laundry day begins to coincide with strange plumbing noises, it is frequently an important sign that something bigger is taking place.
What If More Than One Toilet Is Bubbling?
That is another important consideration, and it relates to why these strange sounds are worth investigating.
If one toilet is bubbling or gurgling, it might seem fairly simple to identify the likely cause and address the issue.
In reality, it can help to think about how the problem impacts the rest of the home’s plumbing.
It can help to ask the following question:
“If one toilet is affected by this issue, what else could be impacted?”
Maybe the second-floor toilet bubbles when someone takes a shower on the first floor.
Perhaps a second toilet begins to gurgle when the washing machine is draining.
It can be difficult to ignore a pattern like that, and it might be an indication that something is happening within the larger plumbing system.
This does not always mean there is an issue with the main sewer line, but it is frequently a good idea to conduct a more thorough inspection.
Slow Drains Are Worth Considering Too
It is easy to overlook slow drains.
If the sink has always been a little slow, it can be tempting to write it off.
The same rule applies to the shower, particularly if it only takes a little bit longer to empty than normal.
“Unclogging” the drain might happen a few times throughout the year, but none of those issues are terribly worrisome on their own.
It can help to keep all of these potential problems in mind when a mysterious toilet begins to sound like it has swallowed a bottle of soda.
If a variety of drains have become slow or stopped working at roughly the same time, it is frequently necessary to consider more than one potential issue.
Sewer Odors Can Be Another Concern
That leads into the next consideration: strange sewer smells.
Maybe the toilet isn’t the only issue, and it certainly isn’t the most worrying one.
The shower is running slowly, and the toilet bubbles at odd times, but it seems like the most concerning part is the strange smell wafting out of the bathroom.
This doesn’t happen all the time, but it seems to occur regularly enough to be noticeable.
It isn’t ideal, but it isn’t something that homeowners would immediately panic about either.
That is understandable, but strange sewer odors should not be ignored, especially when they appear alongside other issues.
It is much easier to investigate potential problems if homeowners have the opportunity to do so before an entire room begins smelling like a sewer.
Even so, there is no reason to panic if that does happen.
It is much more important to remember that those odors are worth investigating, no matter how briefly they linger.
This Is What a Camera Inspection Can Help With
Sometimes it can be difficult to say exactly what is happening within the drainage system.
It can feel a bit like a guessing game, and homeowners might find themselves spending money on unnecessary repairs.
If a drain camera inspection is an option, plumbers can get a detailed view of what is taking place within the system, allowing them to investigate potential issues in greater detail.
It can help to think of it as an opportunity to gather more information, potentially identifying the cause of recurring issues.
We have written a more in-depth blog post about drain camera inspections, but the most important point is that it helps you have more information when it comes to addressing the issue.
This means you can make a more educated decision about how to proceed.
You Don’t Have to Wait Until the Worst Possible Moment
This is likely the most important message.
A toilet bubbling at odd times doesn’t seem terribly urgent, especially if it continues to appear to be a minor nuisance.
It seems reasonable for homeowners to put off addressing what looks like a small issue, particularly if it only happens occasionally.
At some point, however, the toilet will no longer be the only concern.
The shower will take an unreasonably long time to drain, or it will completely stop working.
The washing machine will malfunction, or the toilet will no longer flush.
Those are the points at which homeowners begin to realize that they should have addressed those strange bubbling sounds sooner.
To clarify, you shouldn’t necessarily rush to schedule an emergency plumbing inspection the moment a toilet bubbles at an unusual time.
It is also true that most plumbing issues are relatively simple and straightforward to fix, especially if you call a professional when the first signs appear.
What A+ Drain Cleaning and Plumbing Will Ask
When you contact A+ Drain Cleaning and Plumbing about a toilet that bubbles at odd times, we will ask you a series of questions.
We want to know if the toilet bubbles when the shower is running, but we also want to know about the washing machine and the state of other drains within the home.
Did you notice strange sewer odors?
Is the problem limited to one toilet?
Have drains begun to move more slowly?
Those are all important considerations, and we will review them individually.
Sometimes the cause will be fairly obvious, but it is also possible that an entirely different issue will need to be addressed.
In short, we want to make certain we fully understand the exact situation.
There is no need to panic about a mysterious bubbling toilet, but it is also important to avoid rushing to an incorrect conclusion.
Contact A+ Drain Cleaning and Plumbing Today
If your toilet bubbles at strange times or causes unusual noises when the shower is running, contact A+ Drain Cleaning and Plumbing
Frequently Asked Questions
Why does my toilet bubble when the shower is running?
Water pressure changes frequently within the plumbing system, and a bubbling toilet can be the result of a restriction somewhere within the drain.
It might also be caused by unusual airflow.
Does a bubbling toilet mean my sewer line is clogged?
Not necessarily, but there are several other concerns that may be worth investigating.
Why does my toilet gurgle when the washing machine drains?
The washing machine can put a surprising amount of water within the drain at a given time.
If there is already a restriction, that additional volume can exacerbate the issue.
Should I worry if the toilet only bubbles occasionally?
It might not be something to worry about, but it can help to understand what is happening within the plumbing system.
Can a slow shower drain be connected to a bubbling toilet?
It definitely can, but there are other potential reasons that a toilet might bubble at odd times.
When should I call a plumber?
If the toilet continues to bubble, multiple drains have slowed down, or there are concerns about the sewer line, it can help to request an inspection.
Final Thoughts
A toilet that bubbles at odd times has the potential to be both alarming and amusing.
You hear it one morning and assume nothing is wrong, but by the end of the week it has become more frequent.
You investigate, but there doesn’t seem to be a clear reason why it is happening.
It becomes obvious that the bubbles are coming from the toilet, but most of the time it is simply a nuisance.
It is a strange situation, and the best way to deal with it is to remember that those unusual sounds may point to an issue elsewhere in the home’s plumbing.
The following are just a few ways to help you find it.
The shower slows down.
The washing machine drains.
Another toilet gurgles.
Odd smells appear intermittently.
All of those things can help identify the issue, and that is why it is important to pay attention to what happens in the days or weeks following a bubbling toilet.
You don’t have to wait until water begins backing up into your home to investigate.
If your toilet appears to be bubbling when someone is showering, A+ Drain Cleaning and Plumbing can help.