The sewer line is one of the most critical yet overlooked components of your home’s plumbing system. What is a sewer line inspection? It’s a diagnostic method used to evaluate the condition of this underground pipe, which connects your household drains to the municipal sewer system. When something goes wrong such as a clog, crack, or root intrusion, it can lead to serious problems such as backups, flooding, and costly property damage.

A sewer inspection provides a clear, internal view of the pipe and helps catch issues early before they escalate into major repairs.

What Is a Sewer Line Inspection?

A sewer line inspection involves using a specialized waterproof camera attached to a flexible rod. This camera is inserted into your main sewer line through a cleanout point and feeds real-time video to a monitor. A licensed technician watches the footage as the camera travels through the pipe, identifying any signs of damage, blockage, or deterioration.

Unlike traditional guesswork or digging, this method is non-invasive, efficient, and highly accurate. It allows plumbers to detect and locate problems without tearing up your yard, driveway, or flooring.

When Should You Get a Sewer Line Inspection?

There are several situations where a sewer inspection is not only useful, it’s necessary:

Before buying a home: Older homes, in particular, may have deteriorating pipes, root intrusion, or outdated materials like clay or cast iron. An inspection can help avoid future repair costs.
Frequent drain backups or slow drains: If you’re experiencing issues in multiple fixtures, it may signal a more serious problem in the main sewer line.
Unusual odors: Persistent sewer smells coming from drains or your yard can indicate cracks or leaks in the line.
Patches of overly lush grass: In a yard, this could mean a sewer leak is fertilizing a specific area.
Flooding or standing water in the basement or yard.
Before or after major plumbing repairs, especially if trenchless repair or relining is being considered.

What Can a Sewer Camera Detect?

Sewer line inspections can identify a range of problems, including:

Tree root intrusion
Cracks or fractures in the pipe
Collapsed or sagging sections (also known as “bellies”)
Corrosion or deterioration
Blockages from grease, debris, or foreign objects
Misaligned pipe joints
Evidence of past repairs or poor installation
Pipe material type and condition

How the Process Works

Access Point: The technician locates a cleanout or entry point to insert the camera.
Insertion: A flexible rod with a high-definition camera is pushed through the sewer line.
Live Feed Review: The technician monitors the live footage and records problem areas.
Diagnosis: If issues are found, a detailed report is generated, often with video or photo documentation.
Recommendations: Based on the findings, the plumber may suggest cleaning, repair, or further testing.

Benefits of Sewer Line Inspection

Accurate diagnosis without digging
Pinpoints the exact location of problems for targeted repairs
Saves time and labor by eliminating guesswork
Reduces long-term costs by catching problems early
Proper documentation for insurance or real estate transactions
Supports trenchless repair planning, which requires detailed internal visuals

Sewer Line Inspection for Homebuyers

If you’re purchasing a property, especially an older one, checking your sewer can save you thousands of dollars. Many home inspections do not include the sewer line unless requested. Hidden damage in the underground sewer line can lead to extensive repairs shortly after moving in. A quick video inspection before closing can help you negotiate repairs or walk away from a risky investment.

Final Thoughts

A sewer line inspection is one of the most cost-effective and revealing tools in modern plumbing. It helps homeowners and buyers understand the health of their underground piping and take action before minor issues become major disruptions. Whether you’re experiencing slow drains or just want peace of mind before buying a home, a professional sewer inspection is a wise, proactive choice.

If it’s been years since your last inspection, or you’ve never had one, it might be time to schedule one and protect your home from hidden plumbing problems.

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