How to Protect Pipes from Freezing: An October-to-January Plan

To protect pipes from freezing, fix the weak spots before the first hard freeze, keep heat and a little moving water reaching vulnerable pipes when a cold snap arrives, and check for hidden cracks after the thaw. Most frozen-pipe damage in North Jersey happens in a few predictable places. Here is the plan, from October through January.

What temperature do pipes freeze, and which ones go first?

Water freezes at 32°F, but pipes inside a heated house are usually protected until it gets much colder outside. Insurer American Family says outdoor temperatures only need to drop to about 20°F for a few hours to put exposed pipes at risk. Wind, an uninsulated wall or an open garage door shortens that window.

In homes around Fair Lawn and across Bergen County, these usually freeze first:

• Hose bibs. Older homes often have ordinary outdoor faucets rather than frost-free ones, so water sits right at the outside wall.
• Kitchen sinks on exterior walls. Supply lines run through a cold wall behind a closed cabinet.
• Split-level crawl spaces that get little or no heat.
• Bonus rooms over garages, where bathroom and laundry lines sit above unheated space.
• Where the water service enters the foundation, a spot the Red Cross specifically names.

October: find the weak spots before the first hard freeze

1. Shut off and drain hose bibs. Close each indoor shutoff, disconnect hoses, then open the outside faucet so it drains.
2. Drain sprinkler lines or have the system blown out.
3. Insulate exposed pipes in the crawl space, garage, attic and unfinished basement.
4. Find and test your main shutoff. A stuck valve is something to discover now, not with water on the floor.
5. Keep an outdoor meter pit lid closed tightly and let snow cover it, as New Jersey American Water advises.

Are heat tape and foam sleeves worth it?

Foam sleeves are an easy, low-risk fix for pipes you can reach. Heat tape suits short runs that sleeves alone won't protect, like a crawl space line. Use only UL-listed products, as the Red Cross recommends, and follow the manufacturer's instructions on wrapping and covering. If a pipe needs heat tape every winter, ask a plumber about rerouting it or insulating the space.

The night a cold snap hits: how to protect pipes from freezing

• Drip the right faucets. Let a slow, steady drip of cold water run from faucets fed by pipes on exterior walls, over garages or through crawl spaces.
• Open cabinet doors under sinks on outside walls so room heat reaches the pipes.
• Keep the thermostat steady day and night; skip the overnight setback.
• Close the garage door if water lines run through the garage or the room above it.
• If you're away, leave the heat set no lower than 55°F, per the Red Cross frozen pipe guidance, and have someone check the house.

When the furnace or boiler is the real problem

Many frozen pipes start with a heating failure, not just a cold night. A furnace that quits at 2 a.m. or a boiler with a cold zone lets a house cool fast. If your heat goes out, open cabinets, start dripping faucets and get the heating repaired right away. If it will be off for a long stretch, shutting off the main and draining the lines is safer. Because we work on heating as well as plumbing, we can handle both sides of that problem.

If a pipe freezes: how to thaw it safely

If a faucet only trickles, suspect a frozen pipe. New Jersey American Water, quoted in this NJ101.5 report, says to shut off the water before thawing anything, so a split pipe doesn't flood the house as the ice melts.

1. Shut off the main water valve.
2. Open the affected faucet.
3. Warm the pipe gently with a hair dryer, heating pad or warm towels, starting near the faucet and working back.
4. Never use an open flame or torch.
5. If the frozen section is inside a wall or you can't find it, call a licensed plumber.

A freeze where the line comes through the foundation may need water line repair rather than a simple thaw.

After the thaw: checking for hidden damage

A pipe can crack while frozen and stay dry until it thaws and pressure returns. New Jersey American Water notes that freezing can cause unseen cracks in pipes or joints. After restoring water, watch for:

• Stains, wet drywall or bubbling paint near the frozen section
• Dripping inside sink cabinets or the crawl space
• Lower water pressure than before
• The water meter moving with every fixture off

If you see any of these, or the frozen pipe ran inside a wall or ceiling, schedule leak detection and pipe repair. Finding the crack before opening walls limits the damage. If the same pipes keep failing, our guide to reading Fair Lawn pipes by house age helps weigh spot repairs against bigger fixes.