Diagnosis

Sewer Camera Inspection: What It Shows and What It Costs

By Houston Sewer Repair · September 11, 2026 · 5 min read

A sewer camera inspection is the least glamorous $400 in home repair and the one that saves the most money. It is also the step that gets skipped most often, usually by a contractor who already knows what they want to sell. Here is what the camera does, what the footage looks like when something is wrong, and how to read the report you should be handed at the end.

The equipment

A waterproof camera about an inch across, with its own lights, on the end of a stiff fiberglass push rod on a reel. The reel has a footage counter. The camera head is self-leveling, so the picture stays right-side up as the head rolls, and it carries a small radio transmitter — a sonde. Above ground, a handheld locator picks up the sonde and reads its position and depth. That is how "there is a break somewhere in the yard" becomes a paint mark on the grass and a number like "31 feet, 3 feet 4 inches deep."

The camera goes in through the cleanout — a capped 4-inch pipe at the front or side of the house. Pre-1980 Houston homes often do not have one, so we pull a toilet and go in through the flange, or install a cleanout first, which you will want for every future visit.

What the footage shows

A sound pipe. Uniform round walls, joints as thin lines, water running clean along the bottom. In PVC it looks white; in cast iron, dark and slightly rough. This is what half of our inspections find, along with grease or roots that jetting fixes.

Offset joints. A step in the pipe where one section sits higher or lower than the next. In Houston's 1970s–90s PVC and ABS laterals this is the most common finding — the clay pulled the joint apart. An offset under an inch can be lined over; over an inch, it catches paper and has to be dug.

Bellies. The camera goes underwater. The picture turns murky, the head travels along the sag, and the picture clears where the pipe comes back up. The length of the murky stretch is the belly. Short ones are a spot repair; long ones are a replacement.

Channel rot. In cast iron, the floor of the pipe goes flat and rough instead of round, then shows holes with clay behind them. This is what sixty years under a Meyerland or Bellaire slab does to cast iron, and it is why we always hydrostatic-test a 1950s–70s slab home after the camera.

Roots. Fine white hair roots waving at a joint, or a dense brown mass filling the pipe. Roots come in through a joint that has already opened, so the finding is the joint, not the tree.

Cracks. Longitudinal cracks in PVC, usually from a crushing load — a driveway poured over a shallow line. Shattered hubs in cast iron.

Collapse. The camera stops. Soil in the picture. Nothing goes further, and the fix is a replacement of that run by trench or by pipe bursting.

Debris. Grease, scale, a child's toy, construction mortar in a new build. A cleaning job.

What the report should say

• The recording, on a USB drive or a link, not just a verbal description
• Each finding with its footage from the cleanout and its depth
• The surface location marked, with paint or a flag
• Pipe material and diameter
• A recommendation with a method and a written price if a repair is needed — and "no repair needed" written down if that is the finding

A contractor who runs a camera and will not hand over the video is asking you to trust a summary of the thing you paid to see. Get the video.

What it costs

Typical ranges, not a quote. The sewer camera inspection page has the details.

The Houston add-on: the hydrostatic test

On a slab home, a camera can miss a leaking joint under the slab if the joint is above the waterline. A hydrostatic test plugs the lateral at the cleanout, fills the drain system to slab level and watches the water for 15–20 minutes. If it drops, something under the slab is leaking into the clay. Isolation testing — plugging one branch at a time — narrows it to a single run, and then the camera goes down that run. Foundation companies require it after leveling, and buyers of pre-1975 homes should ask for it during the option period. Sewer inspection before buying a house covers using the result in a negotiation.

When to get one

• Any main-line backup, before agreeing to a repair
• A line that has been snaked twice in a year
• Before buying a house built before 1980, or any house with a big tree between it and the street
• After foundation repair on a slab home, with the hydrostatic test
• Before a remodel that adds a bathroom to an old slab
• Every few years on a cast iron house, to watch the rot progress and plan the replacement instead of meeting it as an emergency

Four hundred dollars for a look is cheap next to the $10,000 difference between the right repair and the wrong one.