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Winter Drain Care: How to Prevent Freeze-Ups & Backups in December

In the Chicago area, December marks the start of freeze season, and that means your drains and sewer lines are at higher risk for clogs, backups, and even frozen pipes. Taking a few simple preventive steps now can save you from expensive emergency repairs later. At Open-Drains, we help homeowners and businesses keep their plumbing systems running smoothly all winter long. Here’s what to know as temperatures drop.

Why Drains Freeze in Winter

Cold weather affects your plumbing in several ways. Standing water in pipes can freeze and expand, slowing drainage or creating blockages. Snow and ice can cover outdoor drains, roof drains, and sump pump discharge lines. Even the ground itself shifts as it freezes, putting pressure on aging sewer lines. Combine these factors with heavier holiday kitchen use and you have a recipe for winter plumbing issues.

Signs Your Drains May Be Freezing

Catch problems early by watching for:

Slow-moving or gurgling drains
Sewer odors indoors
Water backing up from floor drains
Ice around exterior pipes
Sump pump cycling inconsistently

If you notice any of these signs, it’s best to schedule an inspection before temperatures drop further.

How to Prevent Freeze-Ups in December

1. Insulate Vulnerable Pipes

Pipes in basements, garages, crawl spaces, and exterior walls cool quickly. Adding insulation sleeves helps keep water flowing and reduces freeze risk.

2. Keep Outdoor Drains Clear

Check driveway drains, stairwells, window wells, and downspouts regularly for snow and ice buildup. Blocked exterior drains can lead to flooding or freeze damage.

3. Avoid Holiday Grease Clogs

Grease from cooking solidifies rapidly in cold pipes. Never pour fats or oils down the sink. Consider a preventive kitchen drain cleaning if you’re hosting holiday gatherings.

4. Protect Your Sump Pump Discharge Line

Ensure the line is insulated, sloped correctly, and clear of snow. A frozen discharge pipe prevents your sump pump from working, which can lead to backups.

5. Schedule a Sewer Camera Inspection

A video inspection in early winter can reveal tree roots, cracks, or blockages before deep cold sets in. This is one of the best preventive tools homeowners can use.

6. Get a Professional Drain Cleaning

A cleared drain is far less likely to freeze. Hydro-jetting or rodding removes grease, roots, and debris that restrict flow during cold months.

If Your Drains Freeze

Turn off your water if you see leaks, avoid using direct heat sources, and call a professional. Frozen pipes can burst, causing significant damage if not handled properly.