Illinois plumbing is dominated by two realities: cold winters and old infrastructure. Chicago has more lead service lines than any other U.S. city, and the city and state have committed to replacing them over the coming years. Bungalows, two-flats and greystones across Chicagoland commonly have cast iron drains, basement plumbing and aging water heaters.
Heavy rain is a serious basement-flooding risk in parts of the Chicago area, where older combined sewers can surcharge and push water back into homes. Downstate, many rural homes rely on wells and septic systems.
Plumbing services we provide in Illinois
These are the services Illinois homeowners call about most often, based on the conditions above.
Water Line Repair
Water line repair fixes the underground service line that carries water from the municipal meter or curb stop to the house.
Water Line Repair details →
Sump Pump Repair
Sump pump repair restores a basement or crawl space pump that collects groundwater in a pit and pumps it away from the foundation.
Sump Pump Repair details →
Sewer Line Repair
Sewer line repair fixes damage to the building sewer or lateral, the pipe that carries wastewater from a house to the public sewer main or septic system.
Sewer Line Repair details →
Drain Cleaning
Drain cleaning is the mechanical removal of buildup, debris or roots from drain and waste pipes so water flows freely to the sewer or septic system.
Drain Cleaning details →
Pipe Repair
Pipe repair is fixing a damaged section of a home's water supply or drain piping, from a pinhole leak or failed fitting to a split caused by freezing.
Pipe Repair details →Local conditions that affect plumbing in Illinois
Lead service lines
Chicago and other Illinois communities are working through lead service line inventories and replacement. Check your utility’s records before planning private work.
Basement backups
Overhead sewers, backwater valves and sump pumps with battery backup are common protections in flood-prone neighborhoods.
Frozen pipes and service lines
Long subzero stretches freeze pipes along exterior walls and occasionally buried service lines.
Two-flats and multi-unit buildings
Shared risers and stacks mean a single failure can affect more than one unit.
Illinois-specific service guides
Where a service works differently in Illinois because of soils, climate, water or local rules, we cover it in depth:
City plumbing guides in Illinois
Plumbing emergency in Illinois?
- Shut off the main water valve if water is leaking or a pipe has burst.
- Keep away from water near outlets, cords or the electrical panel.
- If sewage is backing up, stop using every drain in the house.
- If you smell gas, leave the building and call the gas utility or 911 from outside.
Illinois plumbing questions
How do I know if my Chicago home has a lead service line?
Check the city’s lead service line inventory for your address, or look at the pipe entering the basement before the meter. Lead is dull gray, soft, and shiny when scratched; a magnet will not stick.
Why does my Chicago-area basement flood in heavy rain?
Older combined sewers can fill during intense storms and push water back through floor drains. Backwater valves, overhead sewers and sump pumps with backup reduce that risk.
Does Illinois have lead service lines?
Yes, a very large number, particularly in Chicago. Illinois law requires water systems to inventory and replace lead service lines over time; check your utility’s records.
Why do Chicago-area basements flood?
Combined sewers in Chicago and many inner suburbs surcharge during heavy rain. Many homes have overhead sewers or backwater valves for protection.
Is Illinois water hard?
Most groundwater in Illinois is hard. Lake Michigan water, supplied to Chicago and many suburbs, is moderately hard.
Do Illinois homes need sump pumps?
Many do, because clay soils hold water after storms. A backup pump is common in finished basements.
Are private wells common in Illinois?
Yes, in rural areas. Testing for bacteria and nitrates is recommended; some regions also have naturally occurring arsenic or radium.
How do I protect Illinois pipes in winter?
Insulate rim joist pipes, disconnect hoses and keep heat on during polar vortex cold.
