Most drain emergencies give warning signs first, and most can be prevented with a few habits and a little seasonal maintenance. This guide collects the practical advice that applies to nearly every home in Chicago, the suburbs and the Rockford area. For conditions specific to your community, such as housing age, soil, creeks and sewer type, see your area page.
Warning Signs Worth a Call
Call before a partial blockage becomes a backup when you notice any of these: several drains slowing at once, a basement floor drain that gurgles, water rising in the tub when the toilet flushes, sewage odors in the lower level, or water appearing at the floor drain when the washing machine empties. One slow fixture usually means a local clog in that fixture's branch line. Several slow fixtures, especially on the lowest floor, point to a restriction in the main line. Catching it early usually means a shorter, less expensive visit and protects finished spaces.
Kitchen Habits
Grease is the most common cause of kitchen line clogs. Pour cooled cooking fat into a can and throw it out rather than rinsing it down the sink, and wipe greasy pans with a paper towel before washing. Hot water and dish soap do not dissolve grease; they only move it farther down the line, where it cools and sticks to pipe walls. Scrape plates into the trash, go easy on the garbage disposal with fibrous foods, coffee grounds and eggshells, and run cold water while the disposal operates. In older homes with cast iron drains, internal scale catches grease faster, so these habits matter even more.
Bathrooms and Laundry
Flush only toilet paper. So-called flushable wipes, paper towels, dental floss and hygiene products do not break down and are a leading cause of main line blockages. Use hair catchers in tubs and showers and clean them weekly. Clean or replace the lint screen or lint trap on the washing machine's discharge, since lint builds up in laundry drains and in the main line downstream of them.
Sump and Ejector Pumps
Test the sump pump at least once a year, ideally before the spring thaw, by slowly pouring a bucket of water into the pit and watching the pump start, empty the pit and shut off. Make sure the discharge line is clear and carries water well away from the foundation. Consider replacing pumps older than about ten years before they fail, and add a battery backup so the pump keeps working during the storms that most often knock out power. Ejector pumps, which lift wastewater from basement bathrooms and laundry rooms, should be checked for constant cycling, alarms and odors. A pump that runs too often, too long or not at all is worth having inspected.
Winter and Spring
Frost and spring thaws stress buried pipe. Before winter, disconnect garden hoses and make sure sump discharge lines will not freeze shut. Before spring, test the sump pump, clean gutters and extend downspouts so roof water lands several feet from the foundation. If drains slow after a hard winter, have the main line checked, because shifting soil can open joints in older clay laterals and let roots or soil in.
Basement Backup Protection
Storm backups and clogs are different problems. A clog is a blockage in your line; a storm backup happens when the public sewer fills during heavy rain and pushes water back toward the lowest fixture in the house. Rodding fixes a clog but cannot stop a storm backup. For that, the main tools are a backwater valve, which closes when water tries to flow backward, and an overhead sewer conversion, which raises the home's sewer exit above the basement floor and pumps lower fixtures up to it. Many municipalities offer cost-sharing programs for these upgrades, so check with your village or city before scheduling work.
Tree Roots
Roots enter clay and older cast iron laterals through joints and small cracks, then grow into dense masses that catch paper and debris. Rodding cuts them back, but they regrow, often within a year or two. For lines with known roots, scheduled rodding every twelve to eighteen months prevents most emergencies. A camera inspection shows whether the pipe itself is still sound or whether lining or replacement would end the cycle.
Keep Service Records
Keep a simple file for every drain and sewer visit: the date, what was found, what was done, and any camera video or photos. Note where the cleanout is and roughly where the lateral runs. Records help the next crew diagnose recurring problems faster, support insurance claims after a backup, and are valuable when you sell the home. If you are buying a home more than a few decades old, ask the seller for these records and schedule a sewer camera inspection before closing.
If Your Home Uses Septic
Homes on private septic systems, common in parts of Lake, McHenry, Kane and Will counties, need the tank pumped and inspected on a regular schedule. If every drain in the house slows at once, the tank may be full or the drain field may be failing, and a licensed septic contractor should evaluate it.