Why Outdoor Faucets Freeze and Burst
Water expands as it freezes. When water is trapped in an outdoor faucet, also called a hose bibb or spigot, or in the pipe behind it, a hard freeze can build enough pressure to split the pipe.
The worst part is that the damage usually hides inside the wall. The faucet looks fine all winter, and the leak only shows up in spring, when someone turns on the hose and water runs into the basement ceiling or the wall cavity.
When to Winterize Outdoor Faucets in Northern Virginia
Winterize before the first hard freeze. In Northern Virginia, the first freezing nights often arrive between late October and late November. They tend to come earlier in western Loudoun County than in Arlington and Alexandria, where denser development holds a little more heat.
A simple habit: when the forecast first shows overnight lows near 32°F, take 15 minutes and winterize every outdoor faucet. If a freeze is already in the forecast, do it the same day.
How to Winterize an Outdoor Faucet, Step by Step
- Disconnect every garden hose. Remove splitters, timers and quick-connect fittings too. Drain the hoses and store them inside.
- Find the indoor shut-off valve. Many homes have a small valve on the pipe that feeds each outdoor faucet, usually in the basement ceiling, a utility room or behind an access panel near the faucet.
- Close the shut-off valve. Turn a round handle clockwise until it stops, or turn a lever handle so it sits across the pipe.
- Open the outdoor faucet. Let the water in the line run out until the flow stops.
- Open the bleeder cap, if the valve has one. This small cap on the side of the shut-off valve releases the last of the water. Hold a bucket or towel underneath, then close it again.
- Leave the outdoor faucet open for the winter, so any water left in the line has room to expand.
- Add an insulated faucet cover. A foam cover is inexpensive and adds protection during cold snaps.
If an outdoor faucet has no indoor shut-off, it may be a frost-free model, covered below. If it is an older standard faucet with no shut-off, consider replacing it before winter.
Do Frost-Free Hose Bibbs Need Winterizing?
Yes, but the job is simpler. A frost-free hose bibb closes its valve deep inside the wall, where the house keeps it warm, and drains the exposed section when you turn it off.
That only works if the water can get out. A garden hose left connected traps water in the faucet’s long stem, where it can freeze and split the pipe inside the wall, the exact failure the faucet was designed to prevent. For a frost-free faucet, winterizing means:
- Disconnect the hose and any attachments before the first freeze.
- Make sure the faucet slopes slightly down toward the outside, so it drains.
- Check that it shuts off fully and does not drip.
More Ways to Protect Your Pipes This Winter
- Insulate exposed pipes in crawl spaces, garages, attics and unfinished basements with foam pipe sleeves.
- Seal drafts where cold air reaches pipes, such as gaps along the rim joist or where pipes pass through exterior walls.
- Keep the heat on. When you travel, set the thermostat to at least 55°F.
- Open cabinet doors under sinks on exterior walls during cold snaps, so warm air reaches the pipes.
- Let a faucet drip on the coldest nights if its pipes run along an exterior wall. Moving water is less likely to freeze.
- Know where your main water shut-off is. If a pipe does burst, closing it quickly limits the damage.
- Check the sump pump discharge. Make sure the outdoor discharge line drains freely and is not blocked by ice. A frozen line can leave the sump pump unable to clear the pit during a winter thaw.
Signs an Outdoor Faucet Froze Last Winter
Check each outdoor faucet the first time you use it in spring. Turn it on and have someone watch the wall, basement ceiling or crawl space behind it. Signs of freeze damage include:
- Water dripping or spraying inside the house while the faucet is on
- Water stains on the ceiling or wall near the faucet
- Weak or sputtering flow at the spout
- A faucet that drips when closed, or a handle that will not shut off
- Damp siding or soil under the faucet
If you see any of these, close the indoor shut-off or the main water valve and call a plumber. A split pipe behind the faucet usually means replacing the faucet. PlumberBee replaces freeze-damaged outdoor faucets across Northern Virginia, from Leesburg and Sterling to Alexandria, and can install a frost-free hose bibb to reduce the chance of it happening again.
