Why Are My Pipes Gurgling?

Gurgling sounds coming from your pipes can indicate serious plumbing issues, such as deep blockages in your underground pipes. Alternatively, a gurgling sound may simply be due to a clogged P-trap (the curved pipe fitting under your sink), which is usually an easy fix.

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If your pipes are gurgling, there's definitely something going on with your plumbing that should be addressed. Understanding the different causes of this unique plumbing symptom can help you determine whether the issue can be solved in a DIY fashion or if professional intervention is the best way to go. 

A gurgling pipe is generally a symptom of a larger plumbing issue, such as a clogged interior plumbing pipe or a blockage in an underground pipe. When pipes are clogged, air bubbles can become trapped behind the blockage. As the air bubbles push past the clog, bubbling or gurgling sounds occur. Here are some of the most common causes of gurgling pipes: 

Clogged P-Trap

A clogged P-trap is usually considered a minor issue that can often be remedied by simply cleaning out the trap. You can also call in a plumber if you're not comfortable fixing the issue yourself. The P-trap is a curved pipe fitting beneath the sink that prevents sewer gas and odors from traveling up the drainpipe and entering your space. When it becomes clogged, air bubbles that escape cause gurgling sounds. 

Tree Root Invasion

When underground water or sewer lines develop small cracks or holes, the moisture that leaks from the pipes attracts tree roots. If the tree roots make their way into the pipes, they can grow and expand to the point where the pipe is completely blocked. A gurgling pipe is one of the most telltale signs of a tree root invasion. 

Damaged Pipes

If a drain line in your home is cracked or damaged, it can hinder water flow and cause the pipe to leak. When water travels through the damaged pipe, it can cause gurgling sounds. 

Is Pipes Gurgling a Problem?

If you're hearing a gurgling sound coming from your pipes, this usually indicates a plumbing problem that should be addressed as soon as possible. While it's not exactly fun to clean out a clogged P-trap, it's one of the least invasive plumbing issues that causes pipe gurgling.

Tree root invasion and damaged pipes are serious plumbing matters that require the assistance of a professional plumber. In addition to gurgling pipes, signs of a tree root invasion include sewage backup in sinks and toilets, repeated toilet clogs and changes in water pressure. You might also hear gurgling sounds coming from the toilet. 

On top of gurgling sounds, damaged pipes cause symptoms such as strong odors coming from the drains, weakened water pressure and water leaks. If you suspect a tree root invasion or a damaged or broken pipe, it's important to contact a professional plumber as soon as possible. 

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How Do You Stop Pipes From Gurgling?

To stop a pipe from gurgling, you must repair the underlying plumbing issue. If the gurgling or bubbling sound is due to a clogged P-trap, cleaning out the trap should fix the issue. Damaged or broken pipes must usually be replaced or patched to remedy the plumbing problem and stop the gurgling sounds. 

In the event of a tree root invasion, a professional plumber must remove the blockage and repair the pipe. Tree roots are often treated with rooter machines designed with special blades that plumbers insert into the affected pipes. The blades slice through the blockages to allow water to flow freely through the pipes.

Since the roots enter the pipes through small cracks or holes, the pipes may also require repair or replacement. Removing the roots and repairing the pipes should also eliminate the gurgling sounds.