Seven warning signs your main sewer line is failing

The signs

More than one fixture draining slowly at the same time, especially the lowest ones in the house.

Gurgling from a tub or toilet when the washing machine drains.

A toilet level that rises or drops on its own.

Sewage smell in the yard or at a floor drain.

One strip of lawn greener or spongier than the rest, following the line to the street.

Repeat backups in the same place after cabling.

Slab or foundation cracks appearing near where the line runs, from soil washing out under it.

Why older homes here are exposed

Homes built before the mid 1970s often have clay sewer pipe in short sections. Mature ash, sycamore and ficus roots find the joints, get in, and grow into a mat that catches everything.

Cast iron lines from the same era corrode and scale from the inside until the bottom of the pipe channels out.

What an inspection tells you

A camera run from the cleanout shows whether you are dealing with roots, a crack, a separated joint or a low section holding water, and how far from the house it is.

That distinction decides the repair: cabling and jetting for roots, a spot dig for one broken section, or trenchless lining and pipe bursting when the whole run is finished. Getting it inspected before it backs up is what keeps you out of the expensive version.