A frozen pipe is a warning more than a failure. Ice blocks flow, and as it expands it can crack the pipe wall, which only shows once it thaws. Thawing should be gradual and controlled, and it should come with a check for splits so a quiet leak does not follow the relief of getting water back.
Signs you may need Frozen Pipe Thawing
- Faucets that produce only a trickle or nothing in cold weather
- Frost on exposed pipes in a basement, garage or crawlspace
- Strange odors from a drain, caused by a blocked vent or trap
- A bulge or crack in a visible pipe
- Water suddenly returning with a leak or sound after thawing
What Frozen Pipe Thawing covers
Thawing uses gentle, controlled heat and moves from the faucet side toward the blockage so melted water has somewhere to go. Afterward, the pipe is inspected for cracks, insulation is added where it was missing and weak points in the layout are discussed.
How the process works
- 1
Open the faucet
Leave the tap open so steam and melted water can escape and pressure does not build behind the ice.
- 2
Warm the pipe gradually
Heat is applied slowly, starting near the faucet and moving toward the frozen section. Never use an open flame.
- 3
Check for damage
Once water flows, the length is inspected for cracks, and joints are watched while pressure returns.
- 4
Protect against a repeat
Insulation, sealing air gaps and rerouting ideas reduce the chance of the same pipe freezing again.
What Denver adds to the picture
Front Range cold fronts can push temperatures down in hours, and sunny days between them add thaw cycles. That swing is hard on pipes in unheated spaces, so insulation and sealed gaps matter as much as heat.
For more cold weather guidance, see the Denver Water cold weather tips, an independent public resource that also advises never using a blowtorch on a frozen pipe.
What you can do now
During a hard freeze, open cabinet doors under sinks on exterior walls, let a faucet drip, disconnect garden hoses and keep the thermostat steady, including when you travel.
Questions about Frozen Pipe Thawing
Can I use a hair dryer on a frozen pipe?
A hair dryer is a gentle option when used carefully and kept away from water. Avoid torches, open flames and anything that heats the pipe quickly.
How do I know if the pipe burst?
Watch for dripping, spraying or stains as the ice melts. If you see water, close the main shutoff right away.
