What are sewer line bellies?

Tuesday, December 30th, 2025

Many people have never heard the term “sewer line belly,” but if you’ve dealt with slow drains, recurring clogs, gurgling sounds, or backups, especially during the winter, this hidden issue might be the reason. A sewer line belly is a dip or low spot in the pipe where wastewater slows down and collects instead of flowing smoothly to the main sewer. Over time, these low spots trap debris and in freezing temperatures, they can turn into ice pockets, causing blockages that lead to full sewer backups inside the home. Think your sewer has a belly? Call KMB Trenchless to schedule your sewer inspection.

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