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Drains & sewer in Chicago, IL

A single slow sink is usually a local clog a plumber can clear in one visit. Several drains backing up at once, gurgling toilets or water at a basement floor drain point to the main sewer line, which may need cleaning, a camera inspection and sometimes repair.

  • Licensed local plumbers
  • The problem explained before work starts
  • Price agreed before the job begins
Plumber working on the drain pipes under a sink

Drains & sewer services in Chicago

Local conditions

Drains & sewer in Chicago: what's different

Early 1900s Chicago homes often have clay sewer lines and cast-iron drains, and heavy summer storms reveal any weakness in them. Roots, cracked pipe and grease buildup are the usual causes of main-line backups.

Clearing the main and scoping it with a camera shows whether the line is sound or needs repair. Plumbing work in Chicago must be done by licensed plumbers registered with the city, with permits from the Department of Buildings.

Water and sewer in Chicago
The Chicago Department of Water Management supplies water and maintains sewers inside the city.
Permits in Chicago
Plumbing permits are issued by the Chicago Department of Buildings, and plumbing work in Chicago must be done by licensed plumbers registered with the city.

Chicago housing and plumbing

Bungalows, two-flats and greystones from the early 1900s fill neighborhoods like Logan Square and Pilsen, many with basements, cast-iron drains and clay sewer lines.

Other Chicago conditions that affect plumbing

  • Basement flooding: Combined sewers can back up during heavy storms; overhead sewers, backwater valves and sump pumps are common upgrades.
  • Frozen pipes: Sub-zero cold freezes pipes along exterior walls and in unheated porches and garages.
  • Lead service lines: Many older Chicago homes are served by lead service lines, and the city has a replacement program.
  • Deep Tunnel: Chicago's Tunnel and Reservoir Plan (Deep Tunnel) stores stormwater to reduce flooding, but intense storms can still overwhelm local sewers and push water into basements, which is why overhead sewers and backwater valves are popular upgrades.

Neighborhoods and ZIP codes

Plumbers on Thawline cover Chicago and Cook County, including Lincoln Park, Logan Square, Lakeview, Beverly, Pilsen, Rogers Park. ZIP codes: 60290 · 60499 · 60601 · 60602 · 60603 · 60604.

When to call a plumber in Chicago

  • Water backing up in the tub or shower when a toilet flushes
  • Several fixtures draining slowly at the same time
  • Water or sewage at a basement floor drain
  • Gurgling from drains or toilets
  • Sewer smell inside or a soggy patch in the yard
  • The same clog returning within weeks of being cleared

How these problems start and how to choose between repair options is covered in the drains & sewer guide.

Drains & sewer questions in Chicago

Why does my Chicago basement drain back up in storms?

Combined sewers can fill during heavy rain and push water back up through the lowest drain. A backwater valve or overhead sewer stops that; a blocked lateral makes it worse.

Are chemical drain cleaners safe to use?

They can damage older pipes and fixtures, and they make the job hazardous for the plumber if they don't work. A plunger or a drain snake is safer for a single slow drain.

More plumbing in Chicago

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