Seasonal guide
Getting your pipes ready for a Chicago winter
Most frozen pipes are preventable. A short checklist before the first hard freeze covers the places Chicago pipes usually freeze.
Calls are answered by a referral service that connects you with a local plumbing provider. How this works
Before the first hard freeze
- Disconnect hoses; close the interior shutoff to each outdoor faucet and drain it.
- Insulate pipes in unheated spaces: crawlspaces, garages, enclosed porches, rim joists.
- Seal drafts near pipes — basement windows, rim joists, utility penetrations.
- Find and test your main shutoff and label it.
- Check the sump discharge outlet so it won’t freeze shut.
- In multi-unit buildings, tell tenants where shutoffs are and how to report problems.

During extreme cold
- Keep the heat on, including in vacant units.
- Open cabinet doors under sinks on exterior walls.
- Consider letting a faucet on an exposed line trickle, following your water utility’s guidance.
Where Chicago pipes freeze
During the January 2019 polar vortex, extreme cold drove frost deeper than usual and widespread burst pipes and main breaks were reported.
Source: AP via GBH News — Polar blast strains aging infrastructure (Jan. 30, 2019)
Inside homes the usual spots are kitchens on exterior walls, enclosed back porches on two- and three-flats, attic and dormer bathrooms in bungalows, and crawlspaces in suburban homes.
Vacant units and travel
Keep heat on at a safe minimum, have someone check the property during cold snaps, and consider shutting off and draining the water if the property will be empty for a long time.
Frequently asked questions
What temperature should I keep a vacant unit at?
Follow guidance from your insurer and utility. The goal is to keep every space with pipes above freezing, including exterior walls.
Do heat tape or cables help?
They can, when listed for the use and installed per the manufacturer. Improper use is a fire risk.
Related
- Frozen pipesIf it happens
- Emergency plumbingBurst pipe steps
- Two-flat plumbingPorches
- Bungalow plumbingExterior walls
Sources
- AP via GBH News — Polar blast strains aging infrastructure (Jan. 30, 2019) Secondary
- Illinois State Climatologist — Chicago O’Hare climate normals (1991–2020) Official / primary
Information can change; official sources control.
