Leander Freeze Nights Can Crack an Outdoor Pipe
If an outdoor pipe is frozen in Leander, shut off the water feeding that faucet if you can find the indoor shutoff valve, then open the outdoor faucet handle. If water is already spraying, dripping steadily, or running from the wall near the hose bib, shut off your home's main water valve instead. A frozen pipe often splits while the water inside it expands, but the leak may not show up until temperatures climb back above 32°F and the ice thaws.
Remove any garden hose, splitter, timer, or spray nozzle from the outdoor faucet now. A connected hose traps water against the faucet and keeps the spout from draining. You can check this without tools in less than five minutes: look at the faucet body, the pipe coming through the exterior wall, and the ground below it for frost, a hairline split, a bulge, or a wet spot that was not there before the freeze.
Why outdoor faucets crack after a hard freeze
Water expands by roughly 9 percent when it freezes. In a short copper line, a PVC pipe, or the narrow body of a hose bib, that expansion has nowhere to go once ice forms between two solid sections of pipe. The crack may happen at the faucet stem, at a threaded connection, or several feet back inside the wall where the pipe is less visible.
Leander homes can have long stretches of mild weather followed by a night in the 20s. That catches people because the hose is still attached, the irrigation backflow assembly has not been insulated, or the exterior faucet has no working shutoff behind it. A pipe exposed to 28°F air for a few hours may be fine if it is protected and dry, while a wind-exposed pipe holding trapped water can freeze much faster.
The water pressure in a typical house line is often between 40 and 80 psi. Once a split pipe thaws, that pressure can force water through a crack no wider than a pin. A small split behind siding or drywall can soak insulation and framing before anyone sees water at the faucet.
What you can safely do before the pipe thaws
If the faucet has stopped flowing but there is no visible leak, leave the outdoor faucet open and warm the area slowly. A warm, damp towel wrapped around an exposed pipe can help. You can also use a hair dryer on a dry, accessible section of pipe, moving it back and forth rather than holding heat in one place. Keep electrical tools away from standing water, and never use a torch, lighter, propane heater, or open flame on plumbing.
Start warming near the faucet opening and work back toward the house. If the blockage is inside the wall, do not cut into drywall or force the faucet handle. Turn up indoor heat, open the cabinet doors beneath nearby sinks if the pipe runs through that area, and watch for water appearing around the exterior wall, baseboard, or ceiling below.
Do not assume the pipe survived just because water starts running again. Keep the faucet open for several minutes after flow returns and inspect the full visible run. A cracked vacuum breaker, loose packing nut, or split pipe can leak only when the faucet is turned off and line pressure builds back up.
When the problem needs plumbing and water damage work
A dripping outdoor faucet may need a washer, cartridge, stem seal, or vacuum breaker. Water coming from the wall, crawl space, garage ceiling, or brick opening usually means the damaged section is behind the faucet. That is the point to keep the water shut off to that line or to the house and arrange Residential plumbing services so the broken section can be located and repaired before it wets more material.
If water has been running inside a wall for even 30 to 60 minutes, check the other side of that wall as well. Drywall can feel soft at the bottom edge, paint can bubble, and insulation can hold water without showing much from the room side. This is why the cost of repairing a hidden leak is often higher than a visible faucet repair: the pipe repair may be small while the wet area is not.
Keep an eye on nearby plumbing after a freeze night. An outdoor pipe failure is separate from a drain clog that keeps returning, but both problems can show up around the same time when a home has older piping or fixtures that have gone without attention. Before the next cold night, disconnect hoses, drain the outdoor faucet, close the interior shutoff if your home has one, and cover exposed pipe or backflow parts that sit outside.