All of the plumbing fixtures, drains, and pipes in your home are connected to the most important piece of plumbing in your entire home—the main sewer line.

Between improper use of these fixtures, drains, and pipes, and many other outside factors, the main sewer line can endure quite a bit of stress. Eventually, it may become clogged or even collapse, leading to the need for serious repairs or even replacement. Talk about a headache you don’t need!



Knowing what causes sewer lines to clog and the warning signs to look out for can help you avoid major repairs or replacements. For a helpful guide on plumbing mistakes to avoid, which can help prevent issues like sewer line blockages, check out this article from The Spruce.

Common Causes

• Severe Pipe Damage - When sewer pipes are broken or ruptured, the sewage won’t be able to properly drain through the system—leading to immediate and frequent backups.

• A Sagging Sewer - Sagging sewer lines happen over time. This “bellied” pipe occurs when a section of the pipe has sunk due to ground or soil conditions.

• Tree Root Infiltration - As roots grow, they search for water. If they latch onto a sewer pipe, they can grow into the pipe in order to reach the water that it carries. As the roots expand , it will cause frequent clogs and will eventually cause the pipe to collapse.

• Flushing Debris down the Toilet - Treating your toilet as a garbage can will cause sewer drain issues. The rule of thumb when flushing the toilet is to make sure you only flush human waste and toilet paper.

• Pouring Grease Down the Drain - Grease, fats, and oil are a common culprit when it comes to clogged sewer lines. It’s not a good idea to pour these things down a drain.  They will harden when cooled causing a clog in your sewer line.

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