Understanding why pipes burst starts with looking at water at a molecular level. When water freezes molecules spread apart, causing the water to expand by up to 9%. This expansion can crack pipes if there’s nowhere for the water to go, which is why experts recommend leaving faucets dripping during freezing temperatures.
Expert Tips for Dripping Faucets
Joe Weavil with Cardinal Plumbing and Drain Services explains how dripping faucets can protect your home:
- Drip both hot and cold water: Turn on a cold faucet and also let hot water drip from the fixture furthest from your water heater. This keeps water moving through the entire system.
- A small drip is enough: While dripping faucets can increase your water bill slightly, it’s far cheaper than repairing water damage.
Weavil emphasizes another critical preparation step:
“Every homeowner should know where their main water shutoff valve is. If your pipes freeze and burst, shutting off the water quickly can prevent further damage to your home.”
When Should You Start Dripping Faucets?
According to the University of Illinois Building Research Council, home water pipes typically freeze around 20°F. However, to stay safe, experts recommend dripping your faucets when temperatures drop below 32°F. Continue to drip until the temperature consistently rises above freezing…