What Is a Sewer Scope Inspection and Why Does It Matter?
If you’re buying a home or maintaining an older property, you may be asking what is a sewer scope inspection? It’s a camera-based evaluation of the main sewer line from your house to the street. An inspector feeds a flexible camera through the cleanout to spot cracked joints, blockages, tree root intrusion, and other issues that can cause backups.
Why it’s especially important in older Chicago neighborhoods
Many classic Chicago homes still use clay or cast‑iron sewer piping. Over decades, hairline gaps at joints invite thirsty tree roots (often from those big parkway trees) into the line. Roots grow, catch debris, and slowly block wastewater outflow, which can culminate in messy—and expensive—backups into the home.
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The U.S. EPA notes that failing or obstructed wastewater systems are a common source of residential problems, and root intrusion is a frequent culprit.
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Locally, the City of Chicago Department of Water Management reminds owners to maintain private service lines to prevent costly backups.
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The Metropolitan Water Reclamation District of Greater Chicago provides resources on protecting local systems from infiltration and overflow.
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The American Society of Home Inspectors (ASHI) recognizes specialized inspections like sewer scoping as part of a thorough home evaluation.
When you should get a sewer scope
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Buying a home—especially pre‑1980s construction or lots with mature trees
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Recurring plumbing symptoms—slow drains, frequent clogs, gurgling fixtures
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Proactive maintenance—aging pipes, recent settling, or prior root issues
Bottom line: a sewer scope can reveal problems early, help you avoid surprise repair bills (sometimes tens of thousands), and give you confidence in a major purchase.
Sewer Scope Inspection FAQs
What is a sewer scope inspection?
A camera checks your main sewer line for cracks, blockages, and root intrusion.
Why is it important?
It finds hidden issues early, helping prevent backups and major repair costs.
When should I get one?
During a home purchase, if you have recurring clogs/slow drains, or when maintaining older pipes—especially in tree‑lined Chicago blocks.
Are roots really that common?
Yes—older clay/cast‑iron pipes have joints that roots can penetrate, gradually obstructing flow.
What if the scope finds a problem?
Your inspector will document the location and severity so a licensed plumber can clear roots, line the pipe, or replace sections as needed.