You are under contract on a house built in the eighties off FM 1488, the inspection came back clean on the plumbing, and you are about to sign. One question before you do: did anyone actually look inside the sewer line?
Almost certainly not. The short version: a standard Texas home inspection is a visual survey, it is not allowed to open anything, and the pipe that carries everything out of the house is buried. A sewer camera inspection is a separate job that answers a separate question, and on an older house it is the single most expensive plumbing problem you can still find out about before you own it.
What the home inspection actually covers
The Texas Real Estate Commission writes the standards that licensed inspectors work to, and the language is plain about the limits. The general rule in 22 TAC 535.227 describes an inspection as “a limited visual survey and basic performance evaluation” of the house, and states that the inspector is not required to inspect “anything buried, hidden, latent, or concealed.” It also says an inspection “does not require the use of specialized equipment.”
The plumbing section, 22 TAC 535.231, gets more specific. The inspector reports on “fixture drain performance,” which means running water at the sinks and tubs and watching whether it goes down. The inspector is not required to “inspect for sewer clean-outs; or for the presence or performance of private sewage disposal systems.”
Read those two together and you have the gap. Water draining from the kitchen sink at a normal speed tells you the line is not blocked today. It tells you nothing about a root mass that fills half the pipe, a joint that has shifted, or a low spot holding water under the slab. Those are found one way, and it is not on the inspection report.
What a camera inspection is
A plumber opens a cleanout, usually a capped fitting near the foundation or in the yard, and pushes a waterproof camera on a stiff cable down the line toward the street or the septic tank. The picture comes up on a screen in real time and is recorded. A locator on the surface tracks the camera head, so when something turns up, the plumber can mark where it is and how deep. You end up with footage, a location, and a written summary of what was in the pipe.
It is not destructive. Nothing gets dug or cut. And it is a plumbing job under Texas law, because the drain and waste piping from a building to “a sewer service lateral at the curb or in the street” is inside the definition of plumbing in Occupations Code Section 1301.002.
What turns up in Houston-area lines
The findings are a short list, and the house’s age and the trees in the yard predict most of them.
Roots. Roots find water, and a sewer line is water. They enter at joints, and older cast iron and clay lines have a joint every few feet. In a dry July, with the ground baked hard, a live oak or a pine in the front yard will send roots straight to the one wet seam in the yard. A camera shows the root mass and the joint it came through, which is the difference between a clearing and a repair.
Bellies. A belly is a low spot where the pipe has settled and water sits instead of flowing. The clay soils across Montgomery and Harris County swell when wet and shrink when dry, and a pipe that was laid straight forty years ago has usually moved. Standing water in the footage is the tell. Bellies collect solids and are where recurring backups start.
Offset and separated joints. The same soil movement that makes a belly can pull two sections of pipe apart or push one past the other. On camera it looks like a step in the pipe wall. Soil washes in through the gap, and roots follow.
Cast iron scaling and channeling. Houses from before the late 1970s often have cast iron drain lines under the slab. Cast iron rusts from the inside, the rough surface catches waste, and over decades the bottom of the pipe can rust through entirely, leaving a channel in the dirt where the pipe floor used to be. That one is a replacement, not a repair, and it is invisible from the fixtures until it fails.
Prior repairs. A camera also shows the good news: a section already replaced, a liner, a cleanout that was added. Those tell you the last owner already had the problem you’re checking for.
Which houses need one
Not every house. A five-year-old build on PVC with a clear yard is a low-risk line. The camera earns its fee when at least one of these applies:
- The house was built before the mid-1990s. Older materials, more joints, more time for the ground to move.
- Mature trees stand between the house and the street or, on a septic property, between the house and the tank.
- The seller’s disclosure mentions a backup, a slow drain, or a plumbing repair, even one described as fixed.
- The property is on a septic system. A camera checks the line from the house to the tank; the tank and the drain field are a separate inspection, and in unincorporated Montgomery County that is its own permit and its own set of rules. Do not let one stand in for the other.
- You plan to add a bathroom or finish a room. More fixtures on a marginal line is how a slow drain becomes a flood.
If you skip it and the line is bad, nothing happens until it does. Then it’s your line, under your slab, and the seller’s inspection report was accurate the whole time.
What to do with the findings
Footage with clear pipe and normal flow is a clean result, and it is worth keeping with the closing documents. Roots at one joint are usually a clearing plus a plan to watch that joint. A belly, a separation, or channeled cast iron is a repair estimate, and that estimate is the thing you take back to the negotiating table while there is still a table to take it to. The inspection window written into the purchase contract is the time to run the camera; after closing, the same footage is just a to-do list.
Supply pipe is the other half of an older house, and it fails in its own ways. Our repipe guide covers galvanized, polybutylene and copper so you can check the water side during the same walk-through.
How we handle it
Sewer line work is part of the underground and yard-line service on our services page: locate first, dig clean, restore the yard before we leave. A camera inspection gives you the footage, the location and depth of anything found, and a written quote for the repair if one is needed. The quote is the number you pay. If a repair is called for, rerouting or replacing the bad section is scoped before anything is dug, and the yard goes back the way it was.
If you are in your inspection window on a house in Magnolia, Conroe, Tomball, The Woodlands or anywhere in the Houston area, call (281) 786-3695. Tell us the year the house was built and whether there is a cleanout you can see near the foundation. That is enough to tell you what we expect to find before we run the line.