A standard Texas home inspection does not look inside the drain line, and the rule that governs the inspection says so in as many words. If you want to know what the pipe under the slab looks like before you own it, that is a separate job, ordered separately, and done by someone holding a different license.
The rule that governs a Texas home inspection excludes exactly the things a sewer scope exists to find.
Texas inspectors work to the Standards of Practice at 22 TAC §535.231. On the plumbing system, §535.231(a)(1)(B)(vi)(I) requires the inspector to report as Deficient any deficiencies in “water supply pipes and waste pipes.” That sounds like it covers the drain line. Read the exclusions and it does not.
Section 535.231(a)(2)(D) says the inspector is not required to inspect, among other things, “(iv) for sewer clean-outs; or (v) for the presence or performance of private sewage disposal systems.”
The Commission puts the general principle more plainly in its own FAQ, answering a question about underground drainage: “Inspectors are not required to inspect anything buried, hidden, latent, or concealed.”
A drain line under a slab is buried, hidden and concealed. Everything an inspector owes you on it is what can be seen and what can be tested by running fixtures, which §535.231(a)(1)(B)(vi)(V) covers as “fixture drain performance.”
The same subsection turns off several other things a buyer might assume were checked. Under (a)(2)(A) the inspector is not required to “operate any main, branch, or shut-off valves.” Under (a)(2)(B), not required to “operate or inspect sump pumps or waste ejector pumps.” Under (a)(2)(C), not required to verify the performance of “the bathtub overflow”, “clothes washing machine drains or hose bibbs”, or “floor drains.” Those are the fixtures that tell you first when a drain line is struggling, and not one of them has to be run. A fixture that drains slowly gets reported. A pipe that is cracked, bellied, offset or full of roots forty feet out does not, because nobody looked.
A sewer scope is out of bounds for a TREC inspector unless that person also holds a plumbing license.
The Commission publishes an article on exactly this question, and its answer opens: “NO, unless the inspector is also a licensed plumber.”
The reasoning is the exclusion above, applied to the tool: “A TREC inspector is specifically exempt from inspecting for defects or deficiencies that are otherwise buried, hidden, latent, or concealed and should not inspect the interior of pipes using specialized invasive techniques or equipment such as a sewer scope.”
And the consequence: “According to the Texas State Board of Plumbing Examiners, a sewer scope inspection must be performed by a licensed plumber, and an inspector who performs a sewer scope inspection could be subject to disciplinary action by TREC or the Board of Plumbing Examiners.”
That article is dated August 2018. TREC still publishes it, and the rule text we quoted above, read the same day, agrees with it.
Read what that article is about, because it is easy to take backwards. It tells inspectors what they may not do. It does not tell you not to get a sewer scope. It tells you who has to do it: a licensed plumber, which is the same answer Texas gives for the pipe itself, and we set out why.
A hydrostatic test asks whether the system leaks. A camera asks what it looks like and where. Neither is in the inspection you already ordered.
A hydrostatic test plugs the drain system and fills it with water to see whether it holds. A sewer scope sends a camera down it to see what it looks like. One asks whether the system leaks; the other asks what condition it is in and where.
TREC’s position on the first is the same as on the second: “No, only a licensed plumber may perform a hydrostatic test on a system within a home.” We cover that test, and the rest of the inspector-versus-plumber question.
If you are choosing between them, that is a conversation with the plumber, not with us. What matters here is that neither one is inside the inspection you already ordered.
Nobody adds a sewer scope to the inspection for you. You ask for it, and you ask early enough for the answer to be useful.
The practical shape of it:
Book it separately from the general inspection, because a different license is doing it and the general inspector is not permitted to.
Book it inside whatever period your contract gives you to act on what you learn. A camera run that comes back after that window has closed is information you paid for and cannot use.
Ask for the recording and the footage, not a verbal summary. A sewer scope’s whole product is a video with distances on it. If the plumber reports a problem, you want to know how far out it is, because that is what decides whether the fix is inside the house, under the slab, in the yard, or in the public right-of-way. Those are four different jobs with four different costs and, past the property line, possibly a different owner.
Ask where the line goes and who owns which part of it. Where the utility’s responsibility ends and yours begins is published by the utilities that publish it, and we quote two of them.
If the camera finds something, what happens next is a permitted job rather than a handshake. We set out which permits, and why the trench gets inspected.
We do not publish a price for a sewer scope, because no source we would trust publishes one.
No Texas agency, city or utility we read prices this work. The people who publish prices for it are the people selling it, and a seller’s price list is not evidence of what a job costs. Ring two or three licensed plumbers and you will have better numbers than any page could give you.
We also will not tell you whether to get one. That depends on the age of the house, what the seller has disclosed, what the general inspection turned up and how much a surprise would hurt you. What we can tell you is the part people get wrong: the inspection you already booked did not check, and it was never going to.
Whether the seller had to tell you anything is a separate question with a statute behind it, and we have it. What it looks like when the line has already failed and the house is yours is sewage backing up into the house.
Every figure on this page comes from one of the documents below, each published by the body that sets, measures or administers the thing it describes. We record the document’s own date and the date we read it, because published pages change without notice.
| Source | Document date | We read it |
|---|---|---|
| Texas Real Estate Commission — Real Estate Inspector Standards of Practice (SOP), Online Version: 22 TAC §535.231(a)(1)(A), §535.231(a)(1)(B), §535.231(a)(2) | the Commission’s own publication of its current rules; the page itself carries no revision date | 2026-09-25 |
| Texas Real Estate Commission — Can An Inspector Perform A Sewer Line Inspection? | printed on the article as August 2018; no byline | 2026-09-25 |
| Texas Real Estate Commission — Standards of Practice FAQ, ‘Can a licensed inspector perform a hydrostatic test?’ and ‘Are inspectors required to inspect underground drainage systems or to test gutters or downspouts?’ | undated FAQ items published alongside the rule text on the Commission’s own page | 2026-09-25 |
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