A sewer scope inspection uses a specialized waterproof video camera to inspect the interior of a home's sewer and drain lines. The camera is inserted into the sewer cleanout and advanced through the pipe to the municipal sewer connection or septic tank. This reveals the condition of pipes that are completely hidden underground and inaccessible by any other inspection method.
Insight Home Inspection Services, LLC provides sewer scope inspections for homes in Nashville, Knoxville, and Chattanooga, Tennessee. Founded in 2014 with over 5,000 inspections completed, Insight includes 6 months of additional sewer line coverage with every sewer scope inspection — a key benefit that provides continued protection after closing.
What a Sewer Scope Reveals
Underground sewer lines deteriorate over time. A sewer scope inspection identifies problems that are invisible from the surface:
Root Intrusion
Tree roots seek moisture and nutrients. They enter sewer lines through joints, cracks, and connection points. Once inside, roots grow and expand, creating blockages and eventually breaking the pipe. Root intrusion is one of the most common sewer line problems in Nashville, Knoxville, and Chattanooga, where mature trees are prevalent in established neighborhoods.
Bellying (Sags)
A belly is a low spot in the sewer line where the pipe has sunk due to soil settlement, improper installation, or ground movement. Water and waste collect in the belly, leading to recurring backups and standing water that accelerates pipe deterioration.
Cracks and Fractures
Pipes crack due to age, ground movement, freeze-thaw cycles, and heavy surface loads. Cracks allow groundwater infiltration, which increases flow into the municipal system, and can allow soil to enter the pipe and create blockages.
Pipe Offsets
An offset occurs when two sections of pipe shift out of alignment at a joint. Soil movement, settling, or poor installation causes offsets. Even minor offsets catch debris and create blockages over time.
Blockages
Grease buildup, debris accumulation, collapsed sections, and foreign objects create full or partial blockages. A sewer scope identifies the location and cause of the blockage.
Cast Iron Deterioration
Homes built before the 1970s in Nashville, Knoxville, and Chattanooga frequently have cast iron sewer lines. Cast iron has a functional lifespan of 50 to 75 years. Deteriorating cast iron develops internal scaling, channeling (where the bottom of the pipe corrodes through), and eventually collapses. Replacing a failed cast iron sewer line costs $5,000 to $15,000 or more depending on depth and length.
When You Need a Sewer Scope
A sewer scope inspection is recommended in these situations:
- Homes older than 20 years — Pipes age and deteriorate. Older homes have higher risk of root intrusion, joint separation, and material failure.
- Properties with large trees — Trees within 25 feet of the sewer line pose a root intrusion risk. Large, mature trees can send roots much farther.
- Homes with cast iron pipes — If the home was built before the mid-1970s, it likely has cast iron drain and/or sewer lines that may be nearing the end of their functional life.
- Any home purchase — Sewer line replacement is one of the most expensive repairs a homeowner can face. A $200 sewer scope can prevent a $10,000+ surprise after closing.
- History of slow drains or backups — Recurring drainage problems often indicate a sewer line issue that plunging or snaking provides only temporary relief for.
The Sewer Scope Process
1. Access the cleanout — The inspector locates the sewer cleanout, typically a capped pipe at ground level near the foundation. If no cleanout exists, the camera may be inserted through a roof vent or toilet flange.
2. Insert the camera — A flexible, waterproof camera with a high-intensity LED light is fed into the sewer line. The camera transmits real-time video to a monitor.
3. Full-length inspection — The camera is advanced through the entire sewer line from the house to the municipal connection or septic tank. The inspector observes pipe material, condition, joints, grade, and any defects.
4. Documentation — Defects are recorded with location measurements (distance from the cleanout). Video is saved for your records.
5. Report — Findings are included in your Insight inspection report, delivered within 24 hours. The report identifies the pipe material, condition, specific defects, locations, and recommended actions.
6 Months Additional Coverage
Insight Home Inspection Services includes 6 months of additional sewer line coverage with every sewer scope inspection. This is a significant differentiator. Sewer line problems can develop or worsen in the months after a home purchase. This coverage provides protection during the critical period after closing when new homeowners are most vulnerable to unexpected repair costs.
This additional coverage applies to sewer scope inspections performed alongside a standard home inspection in Nashville, Knoxville, and Chattanooga.
Sewer Scope Cost
A sewer scope inspection is available as a $200 add-on to any Insight home inspection. Given that sewer line repairs range from $2,000 for spot repairs to $15,000+ for full replacements, the $200 investment provides substantial risk reduction for homebuyers in Nashville, Knoxville, and Chattanooga. Insight's standard home inspections range from $450 to $1,000+ depending on square footage, covering 400+ items with reports delivered in 24 hours.
Frequently Asked Questions
How long does a sewer scope inspection take?
A sewer scope inspection typically takes 20 to 45 minutes, depending on the length and accessibility of the sewer line. It is performed during or alongside the standard home inspection.
What types of pipes are found in Tennessee homes?
Common pipe materials in Nashville, Knoxville, and Chattanooga include cast iron (pre-1970s homes), clay/terracotta (older homes), Orangeburg (a tar-paper-based pipe used from the 1940s-1970s, highly prone to failure), ABS, and PVC (newer homes). Each material has different failure modes and expected lifespans.
Can a sewer scope detect all problems?
A sewer scope reveals conditions visible from inside the pipe, including cracks, offsets, root intrusion, bellying, blockages, and deterioration. It cannot detect problems in lines that are fully collapsed and impassable, or assess soil conditions surrounding the pipe.
What happens if the sewer scope finds problems?
Sewer line issues are negotiable in a real estate transaction. Buyers commonly request repair, replacement, or a closing credit. The sewer scope video provides objective documentation of the condition for negotiations.
Is a sewer scope worth it on a new home?
Newer homes with PVC sewer lines have lower risk, but construction defects, improper connections, and inadequate grade do occur. A sewer scope on any home provides baseline documentation and peace of mind.
What does the 6 months of additional coverage include?
The 6 months of additional sewer line coverage provides continued protection after your home purchase closes. Contact Insight for full terms and details of what is covered under this benefit.
Schedule a Sewer Scope Inspection Today
Contact Insight Home Inspection Services to add a sewer scope inspection — with 6 months of additional coverage — to your home inspection in Nashville, Knoxville, or Chattanooga.
- Nashville: (615) 436-0606
- Knoxville: (865) 274-0808
- Chattanooga: (423) 395-2020
- Email: info@inspectedbyinsight.com