Homes here commonly use heat tape, insulated chases, and supply lines buried deep below the frost line to keep water flowing all winter.
Freezing weather doesn't only cause trouble in places with long, hard winters. Even areas known for mild weather get the occasional night when temperatures sit below freezing for several hours. The problem is that many homes in milder areas are not built with freezing in mind. Water lines run along exterior walls, backflow preventers sit out in the open in the yard, and pool equipment has no shelter at all. A single cold night can split a pipe that has never had a problem before.
Why Freezing Pipes Burst
Water expands as it turns to ice. When ice forms inside a pipe, it pushes the remaining water toward a closed faucet or valve, and pressure builds between the ice blockage and that dead end. That pressure, not the ice itself, is what splits copper, cracks PVC fittings and blows apart brass valve bodies. The break often stays sealed while the line is frozen, which is why many homeowners only find the damage the next morning when the sun thaws the pipe and water starts spraying.
In many homes, the most vulnerable spots are above ground. Copper and PVC exposed to open air lose heat quickly, especially on clear nights when temperatures drop fast after sunset. Wind across an open yard makes it worse.
The Parts of a Home Most at Risk
Before a freeze warning, walk the outside of your house and look for these common trouble spots:
- Backflow preventers on irrigation and fire lines. These brass assemblies sit above ground and are expensive to replace when the body cracks.
- Hose bibs on exterior walls, especially older non-frost-free models.
- Pool and spa equipment, including pumps, filters and the PVC plumbing between them.
- Exposed irrigation risers and drip manifolds in landscaping.
- Evaporative cooler supply lines running up the outside wall to the roof, on homes that have them.
- Water heaters and pipes in unheated garages, especially in colder areas.
- Main supply lines where they rise out of the ground near the meter or pressure regulator.
Simple Steps That Prevent Damage
Most freeze protection costs next to nothing. Insulate exposed pipes with foam pipe sleeves from any hardware store, and tape the seams so cold air can't slip in. Fit hose bibs with insulated foam covers after disconnecting the hose, since a connected hose traps water in the faucet. For backflow preventers, use an insulated pouch or wrap the assembly in towels and cover it with a bucket or a purpose-made insulated bag. Some homeowners add a low-wattage heat tape rated for outdoor plumbing, which is a good investment where hard freezes are common.
For pool equipment, most modern pool controllers have a freeze protection mode that runs the pump when temperatures approach freezing. Moving water is much less likely to freeze, so confirm that setting is on before winter. Drip a faucet on an exterior wall overnight during a hard freeze, which relieves pressure in the line and keeps water moving. Open cabinet doors under sinks on outside walls so warm room air gets to the pipes.
A long, severe heating season is the defining plumbing stress in Alaska, and boilers and water heaters run hard for much of the year.
Homes in colder climates need more lasting measures. Frost-free sillcocks, insulated crawlspaces, heat tape on vulnerable runs and a reliable thermostat setting when you travel all matter. If you leave a cabin or second home empty for the winter, shutting off the main and draining the lines is the safest approach.
If a Pipe Freezes
If you open a faucet and get only a trickle during a cold morning, a pipe may be frozen. Leave the faucet open, then warm the suspected section gently with a hair dryer or space heater kept a safe distance away. Never use an open flame or torch. Know where your main shutoff is before you start, because a split pipe will begin leaking as soon as it thaws. Repairs for a split hose bib or a single section of pipe are usually fairly small, often in the $200 to $500 range, while a cracked backflow preventer can run $400 to $900 or more installed, depending on size.
When to Call a Professional
Call a licensed plumber if you find a split pipe, a cracked backflow body, water coming through a wall or ceiling, or a frozen line you cannot reach safely. CKN Plumbing handles freeze damage repairs, insulates vulnerable lines and installs frost-free hose bibs and protected backflow assemblies across Alaska. If a cold snap has left you with a leak or no water, reach us at (928) 470-9007 and we will help you get the water back on and the damage under control.
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