Preventing Winter Plumbing Issues

Get Ahead of Winter Plumbing Problems

For Milwaukee-area homeowners, winter plumbing preparation isn't optional — it's a necessary part of protecting your home from the serious damage that winter can inflict. The combination of extreme cold, increased hot water demand, and systems working at their limits creates plumbing vulnerabilities that proactive preparation can substantially reduce. When polar vortex events push temperatures to -20°F or colder, even well-maintained homes face real risk if pipes aren't properly protected.

Milwaukee's older housing stock adds another layer of complexity. Homes built before 1960 — common throughout the Bay View, Riverwest, and Wauwatosa neighborhoods — often have uninsulated plumbing runs through unheated crawlspaces or exterior wall cavities that were never designed for modern energy-efficient standards. These vulnerabilities become dangerous exposure points when Wisconsin's worst cold arrives.

Pre-Winter Plumbing Checklist

• Insulate exposed pipes: Pipes in unheated areas — crawlspaces, garages, attics, and exterior wall cavities — are the most vulnerable to freezing. Install pipe insulation (foam sleeve insulation or fiberglass wrapping) before temperatures drop consistently below freezing. In Milwaukee's older homes, check the plumbing in the basement ceiling where supply lines run near rim joists or exterior walls.
• Disconnect and drain outdoor hoses: Water left in outdoor hose bibs and hoses freezes and expands, potentially damaging the bib or the pipe behind it. Disconnect hoses and shut off the interior valve that serves outdoor spigots, then open the spigot to allow residual water to drain.
• Service the water heater: Winter places heavier demands on water heaters as incoming water temperature drops significantly. Milwaukee's Lake Michigan water supply arrives cold — sometimes near 40°F — placing extra strain on water heaters already fighting Milwaukee's notoriously hard water mineral deposits. Flushing sediment from the tank, checking the anode rod, and testing the pressure relief valve before winter ensures optimal performance when you need it most.
• Test the sump pump: Flooding risks don't disappear in winter — spring thaw, rain-on-snow events, and basement water infiltration can occur year-round. Verify the pump activates properly before you might need it urgently. Install a battery backup pump in case of power outages during storms.
• Know your shutoffs: Locate your main water shutoff valve and individual shutoffs for toilets and fixtures. In a plumbing emergency — particularly a frozen pipe that bursts — knowing how to shut off water immediately limits damage dramatically. In Milwaukee's older homes, the main shutoff is typically in the basement near the front foundation wall where the service line enters.

During Extended Cold Periods

• Maintain indoor temperatures above 55°F even when away or sleeping — Wisconsin polar vortex conditions can drop outdoor temps faster than a house can retain heat
• Open cabinet doors in kitchens and bathrooms on exterior walls to allow warm interior air to reach pipes
• Allow faucets fed by vulnerable pipes to drip during extreme cold snaps; moving water freezes at a lower temperature
• Check that heating vents or baseboard heaters in vulnerable areas are unobstructed by furniture or rugs
• If you leave town, never turn the thermostat below 55°F and ask a neighbor to check the home during extended cold stretches

Milwaukee's Hard Water and Winter Plumbing Performance

Milwaukee's water supply is among the hardest in Wisconsin, with mineral concentrations that accelerate scale buildup inside pipes and water heaters. This hard water calcification reduces pipe interior diameter over time and creates insulating mineral deposits inside water heater tanks that force the heater to work harder in cold months. Older galvanized pipes — found in many pre-1960s Milwaukee homes — are especially prone to mineral buildup that gradually restricts flow and increases freeze risk in narrow sections.

An annual water heater flush removes sediment buildup and helps the unit recover hot water faster during high-demand winter mornings. If your water heater is more than 10 years old, winter is a good time to evaluate its condition before it fails on the coldest day of the year. Learn more about water heater maintenance and replacement on our Milwaukee Water Heater guide.

What to Do If a Pipe Freezes

Shut off the main water supply if you suspect a frozen pipe. You can attempt gentle thawing with a hair dryer, heating pad, or warm (not hot) towels applied to the suspected frozen section — never use open flame near plumbing. If the pipe has already burst, shut off water immediately and call an emergency plumber. Leave a faucet open after thawing to allow water pressure to release gradually as the ice melts.

If you can't locate the frozen section or if it's inside a wall, do not attempt DIY thawing. Call a licensed plumber immediately — the pipe may have already cracked and will burst when pressure is restored.

Frequently Asked Questions: Winter Plumbing in Milwaukee

How cold does it need to get for pipes to freeze?
Pipes typically begin to freeze when ambient temperatures in unheated spaces drop below 20°F. In Milwaukee, that threshold is crossed dozens of times each winter, including during polar vortex events that push temps to -10°F or -20°F. Exterior wall cavities can reach outdoor temperatures even when interior rooms are heated.

Should I drip my faucets all winter or only during extreme cold?
Dripping is most useful during sustained extreme cold — below 0°F outdoor temperatures or during known polar vortex events. Running faucets all winter wastes water. Reserve it for nights when a hard freeze advisory is in effect for the Milwaukee metro area.

My water pressure drops in winter. Is that normal?
Minor pressure variations are common as demand on municipal supply systems increases in winter. Significant or sudden pressure drops may indicate a partially frozen pipe, a developing leak, or a supply line issue. If pressure loss is accompanied by unusual water meter readings, call a plumber promptly.

Can I use heat tape on pipes in my Milwaukee home?
Heat tape (electric pipe heating cable) is an effective solution for vulnerable pipe runs in crawlspaces or exterior walls in older Milwaukee homes. Have a licensed electrician or plumber install it properly — improperly installed heat tape is a fire risk. Make sure the tape you use is rated for the pipe material (copper or plastic) in your home.

Professional Winter Plumbing Help from Burkhardt

Burkhardt Heating, Cooling, Plumbing & Electric provides winter plumbing preparation services and emergency response for Milwaukee-area homeowners across Milwaukee, Washington, and Waukesha Counties. Our licensed plumbing technicians can insulate vulnerable pipes, service water heaters, inspect sump pumps, and respond to frozen pipe emergencies 24 hours a day. With 60+ years as a family-owned Milwaukee company, we've helped homeowners through countless Wisconsin winters.

Don't wait for temperatures to fall before preparing. Call Burkhardt at (414) 355-5520 to schedule a winter plumbing inspection — and avoid emergencies when they're hardest to handle.