The main sewer line carries everything from the house to the city connection or septic tank. When it fails — roots, a sag, a cracked or offset joint, collapsed cast iron — the symptoms show up indoors, and the fix ranges from a cleaning to an excavation. The camera is what tells you which.

Start with a camera inspection

A camera run after the line is cleared shows the pipe material, the defect, and its exact location and depth — a locator marks it above ground.
It separates “roots at a joint” (recurring cleaning or a spot repair) from “collapsed section” (replacement).
Ask for the video. You’re entitled to it, and a second opinion needs it.

The common failures in Austin

Cast iron drains in pre-1970s homes rusting and scaling from the inside until they channel or collapse.
Clay tile joints outside pulled apart by root intrusion and clay-soil movement.
A “belly” — a sag where the soil settled — that holds water and solids.
Offset joints at the connection to the city main.

Repair options, least to most invasive

Hydro-jetting or root cutting: clears the blockage but doesn’t fix the pipe. Buys time on a line with roots but sound walls.
Spot repair: dig to one bad section and replace it — sensible when the rest of the line is healthy.
Pipe lining (CIPP): a resin liner cured inside the existing pipe — minimal digging, for pipe that’s mostly intact and not collapsed.
Pipe bursting: a new pipe pulled through as the old one is fractured outward — trenchless replacement from two access pits.
Open-trench replacement: the fallback when the line is collapsed, badly bellied, or too shallow to burst.

What drives the price

Depth: a line eight feet down costs far more to reach than one at three.
Access: under a driveway, mature trees, the slab, or along a fence line.
Length — and how much of it is actually bad.
Whether the run from your property line to the main is involved. In Austin the homeowner is typically responsible for the private lateral up to the connection; confirm where yours ends.
Restoration: concrete, landscaping, flooring.
Permits and the required inspection.

Don’t skip

A sewer repair quote without a camera inspection is a guess. And if drains are backing up right now, stop running water — every flush has to go somewhere.

Camera first, then the least invasive fix that actually addresses what the camera showed. Depth and access — not the pipe itself — are what you’re paying for.