Frozen Pipe Prevention: Westchester Plumber's Winter Checklist

Westchester County gets 20 to 40 days per winter where temperatures drop below freezing. Northern towns like Somers, Yorktown Heights, and Bedford see even more. When sustained cold snaps push temperatures into the teens or single digits, pipes freeze.

A frozen pipe is an inconvenience. A burst pipe is a disaster. The average water damage insurance claim from a burst pipe runs over $10,000 nationally. In Westchester, where homes are older and pipes have been in the walls for decades, the risk is higher than in newer construction.

Most frozen pipe incidents are preventable. Here is what to do before the cold hits and what to do if it is already too late.

Not every pipe in your house is at equal risk. These are the ones that freeze first:

Pipes on exterior walls. If a supply line runs through an outside wall to feed a kitchen sink or bathroom, it is exposed to cold on one side. In older Westchester homes without insulated walls, these pipes can freeze when outdoor temperatures stay below 20 degrees for more than a few hours.

Pipes in unheated spaces. Basements, crawl spaces, garages, and uninsulated attics. If the space is not heated, the pipes in it are vulnerable.

Outdoor hose bibs. Garden hose connections on the outside of the house. If the hose is still attached, water trapped between the hose and the shutoff valve will freeze and can crack the pipe inside the wall.

Pipes in the garage. Attached garages are common in Westchester. The water heater, utility sink, or supply lines running through the garage wall are all at risk when the garage door is open in cold weather.

In older Westchester homes (pre-1970), the original plumbing was often run through exterior walls because insulation standards were different. Copper and galvanized steel pipes from that era are more brittle and more likely to burst when they freeze compared to modern PEX.

Do this before the first hard freeze of the season. Most of it takes an hour or less:

Insulate exposed pipes. Foam pipe insulation costs $1 to $3 per linear foot at any hardware store. Cover every exposed pipe in the basement, crawl space, and garage. Pay extra attention to pipes near exterior walls.

Disconnect garden hoses. Unscrew every outdoor hose, drain it, and store it. Then close the interior shutoff valve that feeds the outdoor spigot (most houses have one in the basement). Open the outdoor faucet to let any remaining water drain out.

Seal air leaks around pipes. Where pipes enter the house through exterior walls, seal the gaps with caulk or spray foam. Cold air blowing directly on a pipe freezes it faster than cold temperatures alone.

Know your main water shutoff. If a pipe bursts, you need to shut off the water supply to the whole house in seconds, not minutes. Find the shutoff valve now. It is usually in the basement near where the water line enters the house. Make sure it turns easily.

Keep the heat at 55 degrees minimum. Even when you are traveling. A frozen pipe can burst and flood your house while you are away for the weekend. The heating bill is cheaper than the cleanup.

Open cabinet doors under sinks on exterior walls. This lets warm room air circulate around the pipes during extreme cold.

Consider pipe heating cables. For chronically cold pipe runs that freeze every year, electric heating cables ($50 to $200 per cable) wrap around the pipe and keep it above freezing. Worth it for problem areas.

How to tell if a pipe is frozen before it becomes a burst pipe:

- No water or very low pressure from a faucet. If one faucet has no flow but others work fine, the supply pipe to that fixture is likely frozen. - Frost on the pipe. If you can see the pipe (basement, under a sink), visible frost or condensation is a giveaway. - Unusual sounds. Banging, gurgling, or whistling from pipes when you turn on a faucet. This can mean ice is partially blocking the line. - Bad smell from a drain. If a drain pipe freezes, the blockage can push odors back up through the fixture. This is more common with drain lines that run through unheated crawl spaces.

If you catch it before it bursts, here is the process:

1. Keep the faucet open. Turn on the faucet that the frozen pipe feeds. As the ice melts, water needs somewhere to go. Running water through the pipe also helps melt the ice faster.

2. Apply gentle heat. Use a hair dryer, heat lamp, portable space heater, or towels soaked in hot water wrapped around the pipe. Work from the faucet side toward the frozen section so melting water can flow out.

3. Do NOT use an open flame. No blowtorch, no propane heater pointed at the pipe, no charcoal. This can damage the pipe, ignite nearby materials, or create carbon monoxide in an enclosed space.

4. Check for cracks or bulges. Once the pipe thaws, look carefully for any damage. A hairline crack in copper or a bulge in PEX means the pipe expanded during freezing and may leak under pressure.

5. If you cannot locate the frozen section or cannot thaw it: Call a plumber. Plumbers have professional pipe thawing equipment that works faster and safer than household methods.

The median year built in most Westchester towns falls between 1940 and 1962. That matters for frozen pipe risk in a few ways.

Original copper pipes from the 1940s and 1950s develop pinhole corrosion over time, which weakens the pipe walls. When water freezes and expands inside a corroded copper pipe, it cracks more easily than a new pipe would.

Galvanized steel pipes (common in homes built before 1960) build up mineral deposits inside over decades. The reduced internal diameter means less water flow, which means water sits in the pipe longer and freezes faster.

Older homes also have less insulation in the walls. Modern homes are built with insulation between the exterior sheathing and the interior drywall. Many pre-1960 Westchester homes have little to no wall insulation, leaving pipes in exterior walls directly exposed to outside temperatures.

If you own a home built before 1965, pay extra attention to pipe insulation and consider having a plumber inspect the condition of your supply lines. A proactive inspection ($150 to $300) is a lot cheaper than an emergency repair.