Sewer scope report interpreter: what your findings mean and what to ask for
For home buyers holding a camera report. Each finding in plain words, how serious it usually is, the usual fix with a planning range, and the requests buyers commonly make.
The short answer
Most sewer scope findings fall into three groups. Grease, scale and light roots are maintenance. A shallow belly or a slight offset is usually monitored. Heavy roots, cracks, separated joints and channeling usually lead to a repair, and a collapse or Orangeburg pipe to a repair or replacement quote. Tick what your report lists below.
Tick the findings from your report to see what each one means, how serious it usually is, what fixes it, a planning range for the fix, and what buyers commonly ask the seller for.
Every finding at a glance
What the interpreter says for each finding on its own, with the planning range for its usual fix on a 50 ft line under lawn. The footage decides the real answer: the same word can describe one joint in sound pipe or a whole run that is failing.
| Finding | Usually | Usual fix | Planning range |
|---|---|---|---|
| Offset joint | Monitor it | Monitor — re-scope in a year or two | $150 – $500 |
| Light roots at a joint or two | Routine maintenance | Cut the roots out | $150 – $600 |
| Heavy roots, or roots at many joints | Repair likely | Cut the roots out + Line the run (CIPP) | $4,750 – $13,900 |
| Crack or fracture | Repair likely | Spot repair — dig out one section | $1,250 – $5,000 |
| Broken or collapsed section | Serious — get quotes now | Spot repair — dig out one section | $1,250 – $5,000 |
| Orangeburg pipe | Serious — get quotes now | Replace the run (dig or burst) | $4,300 – $14,200 |
| Cast iron scale or tuberculation | Routine maintenance | Descale the cast iron | Not priced |
| Cast iron channeling | Repair likely | Line the run (CIPP) | $4,600 – $13,300 |
| Clay joint separation | Repair likely | Spot repair — dig out one section | $1,250 – $5,000 |
| Grease or debris build-up | Routine maintenance | Hydro jetting | $400 – $800 |
| Transition to PVC (a past repair) | For the record | Nothing to fix — ask the inspector | Not priced |
| Pipe material not identified | For the record | Nothing to fix — ask the inspector | Not priced |
Planning ranges from the same cost engine as the replacement cost calculator, average-cost area, typical depth, permit included for dig work. Descaling isn't priced because we haven't found a published range we trust. Not quotes.
A belly: it depends on the water
Bellies cause more confusion on buyer reports than any other finding, because the word sounds structural and often isn't. There is no single industry standard for when a belly needs fixing. What plumbers weigh is how deep the water gets, how long the sag is, whether solids collect there, and whether the pipe inside it is cracked or separated. The interpreter treats water depth as the main signal:
| Standing water | Usually | Usual response | Planning range |
|---|---|---|---|
| Up to about 30% of the pipe | Monitor it | Monitor — re-scope in a year or two | $150 – $500 |
| About 30% to 50% of the pipe | Monitor it | Hydro jetting | $400 – $800 |
| More than 50% of the pipe | Repair likely | Spot repair — dig out one section | $1,250 – $5,000 |
| The camera lens went under water | Repair likely | Spot repair — dig out one section | $1,250 – $5,000 |
Why the pipe material changes the answer
A crack in PVC and a crack in Orangeburg are not the same finding. PVC and ABS joints are glued or gasketed and rarely let roots in, so a defect there is usually a single installation or settlement fault. Clay pipe lasts but its joints, every few feet, are where roots get in. Cast iron corrodes from the inside and wears a channel along the bottom. Orangeburg, a fibre-and-tar pipe from the postwar decades, softens and flattens — so the interpreter adds it as a finding on its own and prices replacement whenever you choose it as the material.
If the report doesn't name the material, ask. An inspector can usually tell from the footage, and it is the first thing a plumber will want to know.
Matching the fix to the finding
The most expensive mistake on a scope report isn't overpaying — it's paying for a fix that doesn't match the defect. A cured-in-place liner follows the pipe it's inside, so it seals cracks, joints and roots but can't take out a belly, and it can't be pulled through a collapse. Where several separate defects add up to about the price of lining the whole line — roughly $4,600 – $13,300 for 50 ft in our engine — one fix for the whole run is often worth pricing. Replacing that run by digging or bursting is roughly $4,300 – $14,200.
When a plumber quotes, ask which defects the quote fixes, which it leaves, and whether the price includes the permit, restoration of whatever is on top, and a camera run afterwards to prove the repair.
What buyers commonly ask the seller for
These are the requests that come up after a scope, not advice on which to make. What you can ask for, and by when, is set by your purchase contract — usually within an inspection or due-diligence period — and your agent or attorney is the person to decide it with.
- Nothing, for maintenance findings like grease or light roots — note them and budget for cleaning.
- Clean and re-scope before closing, when debris or water may be hiding the pipe. A second look after jetting often changes the finding, in either direction.
- A plumber's evaluation and written quote within the inspection period. Any credit or repair request is easier to discuss with a number from someone who could do the work.
- A repair by the seller, with a permit, the invoice, and a re-scope afterwards showing the repaired section.
- A credit or price reduction backed by the quote, so you choose the contractor and the method. Some lenders limit how a credit can be used, which is another question for your agent.
What this tool can't tell you
It reads the words on a report, not the footage. It can't see how long a defect is, whether it sits on your side of the property line or under the street, or what's on top of the pipe at that point — all of which move the price. It assumes an average-cost area and a typical depth. Use it to understand the report and to know what to ask; use a plumber's quote to decide.
Sources
Each source was opened and read on October 17, 2026. Rules change — the original is the authority.
- InterNACHI, Sewer Scope Inspection Standards of Practice — what a scope report must list — including any offset over ¼ in and over 1 in of standing water — and that cost estimates aren't requiredhttps://www.nachi.org/sewer-scope-sop.htm
- NASSCO Tech Tip, PACP Condition Grades and Their Proper Application (June 2016) — the 1–5 grade scale, and that a grade alone doesn't decide repair or replacementhttps://nassco.org/wp-content/uploads/2021/02/june_2016.pdf
- NASSCO Tech Tip, Identifying and Classifying a True Miscellaneous Water Level Sag (Feb 2019) — how sags are measured by water depth, and how debris can make water look deeperhttps://www.nassco.org/wp-content/uploads/2021/02/NASSCO_TechTipsFeb2019_Web.pdf
- Town of Oakville, Storm Sewer Master Plan appendices (reproducing the PACP code matrix) — sag water level graded at up to 30%, up to 50% and over 50% of the pipehttps://www.Oakville.ca/getmedia/973a3d81-cd67-4784-90c1-255f30933999/storm-sewer-master-plan-phase-1-appendices.pdf
- City of Ann Arbor, Orangeburg Sewer Piping — what Orangeburg is, when it was laid, and how it flattenshttps://www.a2gov.org/building-rental-and-inspection-services/construction-and-building/orangeburg-sewer-piping/
- BiggerPockets forum — sewer repair estimate after inspection, renegotiate? — buyer questionhttps://www.biggerpockets.com/forums/311/topics/1281509-sewer-line-repair-estimate-15k-after-inspection-should-i-renegotiate-price
- City-Data forum — sewer inspection results, bellied line — buyer questionhttps://www.city-data.com/forum/real-estate/484343-sewer-inspection-results-bellied-line.html
- BiggerPockets forum — roots in sewer, seller credit — buyer questionhttps://www.biggerpockets.com/forums/311/topics/323201-buying-my-first-property-roots-in-sewer-should-i-buy-it
- BiggerPockets forum — failed sewer scope, should we walk? — buyer questionhttps://www.biggerpockets.com/forums/311/topics/192139-failed-sewer-scope-should-we-walk
- InterNACHI forum — should Orangeburg be reported as a defect? — inspector discussionhttps://forum.nachi.org/t/orangeberg-pipe/72109
Frequently asked questions
- The scope found a belly. Do sellers normally pay for that?
- Sometimes, and it depends on the belly and the contract. A short belly holding a little water is often left alone or kept clear with jetting; one that holds more than half the pipe or keeps clogging is usually a repair. Get a plumber's view of the footage first — a written quote is what a repair or credit request is normally based on.
- A plumber quoted thousands to fix the sewer line after the inspection. Should I renegotiate?
- Buyers often do ask for a repair, a credit or a price reduction when a scope finds a serious defect during the inspection period. Whether and how to ask is a contract question for your agent or attorney. Before you do, check the quote fixes what the footage shows: a second quote, or a quote for one fix of the whole line, often changes the number.
- The scope found roots and the seller offered a credit below the plumber's estimate. Is that reasonable?
- It depends on what the roots are doing. Light roots at a joint or two are usually a cutting-and-maintenance job; heavy roots at many joints usually lead to lining or a section repair. Compare the credit with a written quote for the fix the footage supports, not with the worst case.
- The seller offered to hydro jet the line before closing. Is that enough?
- For grease or light roots, cleaning may be all the line needs. For cracks, separated joints, a deep belly or Orangeburg, jetting clears the pipe but doesn't repair it. Ask for a re-scope after the jetting — clean pipe shows its real condition, and the finding can get better or worse.
- The report says Orangeburg pipe. Should I walk away?
- Not necessarily, but plan as if the line will need replacing. Orangeburg is a fibre-and-tar pipe from roughly the 1950s to the early 1970s that flattens under soil pressure as it ages. Many buyers get a replacement quote and ask for a credit or repair; some walk away. Which is right depends on the price, the quote and your contract.
- Should I get a second scope, or a re-scope after the seller's repair?
- A re-scope after any repair is the usual way to confirm the work covered the defect that was found. A second opinion on the original footage is worth it when the quote is large, or when the inspector and the plumber read the same video differently.
- Who pays for the part of the sewer line under the street?
- It depends on the city. In many cities the owner is responsible for the whole lateral, including the connection at the main; in others the city takes over at the property line or the curb. Check your city's rule before you budget a repair.
- Does a sewer scope inspector tell you what the repair costs?
- Usually not. InterNACHI's sewer scope standards don't require inspectors to give repair cost estimates, or to mark defects on the ground. A plumber or sewer contractor gives the quote; this tool gives a planning range so you know whether the quote is in the right neighbourhood.