The answer
Prevention: Disconnect outdoor hoses, insulate exposed pipes in attics/crawlspaces, keep heat >=55°F, and run slow trickles on vulnerable lines during deep freezes. If a pipe bursts:
- Shut main water valve immediately
- Open faucets to relieve pressure
- Shut off electrical breakers near standing water
- Contact licensed plumber.
Sources
This answer is drawn from the standards and guidance below. It is general information about how these systems work — not a diagnosis of your property.