What Are the Signs You Need Sewer Line Repair in Chicago?

Symptoms that point at the line, not the fixture

One symptom on its own can be a coincidence. Two or three together, especially the repeat-backup pattern, are worth a camera before spending money on another rodding.

• Backups that return within weeks or months after rodding
• More than one fixture affected at once — a toilet and a tub, or a floor drain and a laundry sink
• Gurgling from a toilet or tub when a different fixture drains
• Water appearing at the lowest fixture in the house first
• Sewer odor in the basement or in the yard along the run to the street
• A patch of grass over the sewer run that is greener, wetter or sunken
• Slow drainage that gets noticeably worse during and after heavy rain

What actually goes wrong with older Chicago laterals

Roots and bellies are the two that explain most repeat backups. Roots grow back after they are cut, and a belly refills after it is cleared, which is why both feel like the same clog returning.

• Root intrusion at clay joints, which is the most common failure we see
• Bellies — a sagging low spot where solids collect because the pipe no longer falls consistently
• Offset joints from soil movement and freeze-thaw cycles
• Cracked or crushed sections, especially cast iron that has corroded from the inside
• Scale buildup narrowing the usable diameter of an old cast-iron run
• Improper connections from past work, including downspouts tied into the sanitary line

How the diagnosis is actually made

A camera inspection puts the question to rest. The camera goes in through a cleanout and the line is watched end to end, so you can see whether the pipe has roots, a low spot, an offset or a crack, and where along the run it is. Distance readings mark the location so any repair is dug in the right place instead of exploratory trenching.

This is also how you find out that nothing is wrong with the pipe. Plenty of inspections end with grease and wipes in an otherwise sound line, which is a cleaning job and nothing more.

Cleaning and rodding are covered on our drain cleaning page; the camera work and repair methods are on the

sewer repair page.

Repair options once the problem is located

The right choice depends on what the camera shows, how the yard and driveway are laid out, and the village permit requirements. We walk through the tradeoffs before anything is dug.

• Rodding or cutting for roots, when the pipe itself is still sound — a maintenance approach, often repeated on a schedule
• Spot repair, when a single joint or short section has failed and the rest of the run is in good shape
• Trenchless lining or pipe bursting, where access and pipe condition allow, to avoid opening the whole yard
• Full replacement of the lateral, when the run has multiple failures, a serious belly or crushed sections
• A backwater valve, when the problem is the municipal system surcharging rather than your own line failing

What you can do in the meantime

• Keep wipes, grease and paper towels out of the drains, even the ones labeled flushable
• Know where your cleanout is so a camera does not need to be run through a toilet
• Note the date every time the line backs up — the interval tells us a lot
• During heavy rain, stop running laundry and dishwashers if fixtures start draining slowly

Storm-driven backups have their own pattern, described in sewer backup after heavy rain.

Frequently asked questions