What’s Lurking Below? Why Sewer Scopes Matter and What Plumbers Actually Find

What’s Lurking Below? What Sewer Scopes Reveal and Why They Matter in Pittsburgh Homes

A sewer scope inspection isn’t glamorous, but it can be one of the most important parts of protecting your investment, especially in a city like ours with older homes, shifting soil, and maturing tree-lined neighborhoods.

What Is a Sewer Scope?

A sewer scope inspection involves inserting a high-resolution camera into the home’s main sewer line to visually inspect its condition. This is typically done through a clean-out or a vent stack and allows us to assess the integrity of the pipe from the house to the street. The camera sends live video back to a monitor so plumbers or sewer specialists can identify blockages, breaks, or other issues.

What Do Plumbers Commonly Find?

Tree Roots in Clay Lines

Many older Pittsburgh homes have clay sewer pipes, which are highly vulnerable to root intrusion. Tree roots naturally seek out moisture and find their way into tiny cracks or joints in the pipe. Over time, they can cause major blockages or even crack the pipe apart.

Sags or “Bellies” in the Line

Soil shifting from seasonal freeze/thaw cycles or past construction can cause parts of the pipe to sag. These low spots collect water and waste, leading to slow drainage or chronic clogs.

Cracks, Breaks, or Collapsed Sections

Some pipes, especially older cast iron or Orangeburg (a fiber material used in mid-century homes), may be severely deteriorated. These materials degrade over time and are often found cracked, blistered, or completely collapsed.

Offset or Disconnected Joints

Ground movement or poor installation can cause joints between pipe sections to separate. This allows sewage to leak into the surrounding soil and can trigger erosion or backups.

Grease, Debris, and Unflushables

We often see major clogs caused by years of buildup—things like grease, paper towels, wipes, or even children's toys. These foreign objects restrict flow and can lead to costly clean-outs or repairs.

Why It’s Worth It

In Pittsburgh, sewer line repairs can be especially expensive due to deep lines, aging infrastructure, and limited access. If the line runs under a sidewalk, driveway, or street, replacement costs can skyrocket. A sewer scope gives buyers and homeowners peace of mind and a clear view of what’s happening underground.

Bottom Line

Sewer scopes aren’t just for when things go wrong. They're a smart part of due diligence, especially in older homes. As a home inspector, I always recommend this service when the age of the home or visible conditions suggest potential underground issues. It’s a simple step that can save you from a big mess later.

For a typical Pittsburgh residence, homeowners and homebuyers can expect to pay roughly $200–$400 for a standard sewer scope inspection.