Bath tub bubbles up when i flush the toilet drain?

Noel Glover asked a question: Bath tub bubbles up when i flush the toilet drain?
Asked By: Noel Glover
Date created: Thu, Apr 22, 2021 4:47 AM

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Those who are looking for an answer to the question «Bath tub bubbles up when i flush the toilet drain?» often ask the following questions:

❔ Bath tub bubbles up when i flush the toilet?

How a clogged sewer line can cause toilet water to appear in your tub. All of your plumbing devices (toilets, sinks, bathtubs, etc.) feed into the same main sewer line. If your drains and main sewer drain are clear of debris, water flows easily and effortlessly out of your home when you flush the toilet (as seen in the image below).

❔ Bath tub bubbles up when i flush the toilet bowl?

Back to the mysterious toilet bubbling. It may be due to a blockage somewhere in the vent pipe. So when the water is draining from the tub, the air that is supposed to be going through the vent ends up coming up through the toilet drain, which causes the bubbling.

❔ Bath tub bubbles up when i flush the toilet door?

How a clogged sewer line can cause toilet water to appear in your tub All of your plumbing devices (toilets, sinks, bathtubs, etc.) feed into the same main sewer line. If your drains and main sewer drain are clear of debris, water flows easily and effortlessly out of your home when you flush the toilet (as seen in the image below).

9 other answers

Grease buildup: Even though grease goes down your drain as a liquid, once it cools and congeals it will form a solid mass that’ll clog up your main sewer line. Feminine hygiene products: Flushing tampons down the toilet clogs the main sewer line (so don’t do it!).

Back to the mysterious toilet bubbling. It may be due to a blockage somewhere in the vent pipe. So when the water is draining from the tub, the air that is supposed to be going through the vent ends up coming up through the toilet drain, which causes the bubbling.

When a 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 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.

This means that the pressure is being created in front of the object that’s closing them and that the air is creating a difference in pressure once again. That’s why the air is going through the traps and exiting the bathtub or shower drain when you flush the toilet because that pressure needs to be released somehow.

Why Is Water Backing Up in My Bathtub When I Flush My Toilet? The scenario: When you try to flush the toilet, it doesn’t flush and water comes up in the tub. The water in both places goes down after few minutes. The most likely cause: A partial sewer line clog in your bathroom’s drain.

Well, when the vent is blocked, your toilet drain will start bubbling because the air is forced to exit there. This all happens due to the fact that the water is entering a bathtub drain and that forces the air to leave in the toilet bowl. Also, you might notice that other fixtures inside your bathroom are slow when it comes to draining.

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. Clean further down the drain. One option is to pour drain cleaning chemicals down the shower drain, but we don’t recommend this because repeated use of chemical cleaners can deteriorate your plumbing.

When flush toilet water comes up in the tub, it means the blockage is located somewhere past the point of connection. Otherwise, water would simply back up in the toilet. The tub drain is usually at a slightly lower elevation than the toilet, so it provides a way for the flush water to get out of the pipe.

If the vent is clogged up, the air will have no way to move out of the drain resulting in pressure build up inside the drain. When you flush the toilet, the air in the drain will be even further compressed forcing a way through the bathtub or shower drain. This is why you will notice that the tub or showers backs up only after you flush the toilet.

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