This guide walks you through spotting frozen pipes, thawing them safely, and knowing when a local plumber should take over.
How to Tell If a Pipe Is Frozen
The clearest sign is water trickling from a faucet or no flow at all, even though the water is still on at the meter. Feel exposed pipes in cold zones—they'll be noticeably colder than room-temperature pipes, and frost or ice may be visible on the outside.
If only one faucet has low or no water, the frozen section is likely in the line leading to that fixture. If all cold-water faucets are slow or dry, the freeze may be in a main line, and you'll need professional help faster.
What to Check Right Now
Walk your home and identify pipes in unheated or exposed areas: attic, garage, basement, crawl space, and exterior walls facing north or west. Look for pipes wrapped in old or deteriorating insulation, or pipes not insulated at all. Check whether cabinet doors under sinks are open or closed—closed cabinets trap cold air around pipes.
Locate your water shut-off valve before a freeze happens. It's usually near the water meter or where the main line enters your home. Know how to turn it clockwise to stop water flow.
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What to Do Right Now
If you find a frozen pipe, close the water shut-off valve immediately to limit damage if the pipe cracks. Open the affected faucet slightly so water can flow as it thaws.
Warm the pipe using a hair dryer set to medium heat, a heat lamp, or towels soaked in hot water wrapped around the pipe. Work from the faucet end backward toward the frozen section, moving the heat source slowly along the pipe. Never use a blowtorch or direct flame—the risk of fire or pipe damage is too high.
If the pipe is in a wall or crawl space and you can't reach it safely, stop and call a specialist. Thawing hidden pipes requires know-how to avoid water damage inside the wall.
When to Call a Local Plumber
Call immediately if you hear water running inside a wall after a freeze—this means the pipe has cracked and is leaking. Also call if the pipe is in an inaccessible location, if you can't locate the frozen section, or if the pipe doesn't thaw after an hour of gentle heat.
If the freeze is in a shared water line, the meter, or the main supply coming into your home, a specialist needs to handle thawing and any repair. Don't attempt to thaw these yourself; mistakes can damage the meter or cause flooding.
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