TL;DR: Frozen pipe prevention in Utah: insulate lines in unheated spaces, disconnect hoses and use frost-free bibs, keep the house above 55°F when away, and let vulnerable faucets drip in cold snaps. Water expands ~9% when it freezes, enough to split copper and PEX fittings alike.
Which pipes freeze first in Utah homes?
The exposed ones: hose bibs with hoses still attached, lines through unheated crawl spaces and garages, pipes in exterior walls (kitchen sinks on outside walls are the classic), and anything above Utah Valley’s ~30-inch frost line outdoors. January cold snaps below 10°F do most of the damage our crews repair.
What should you do before winter?
Disconnect and drain hoses by late October; an attached hose traps water in the bib. Insulate accessible runs with foam sleeves, pennies per foot against a $1,000+ repair. Seal crawl-space vents and rim-joist gaps near pipe runs. Homes with recurring trouble justify upgrading to frost-free sillcocks, which close the valve a foot inside the warm envelope.
What about during a cold snap or vacation?
During single-digit nights: open cabinet doors under exterior-wall sinks and let the farthest vulnerable faucet drip, moving water resists freezing. Leaving town: heat stays at 55°F minimum, and for winter-long absences shut the main and drain the system. A frozen-then-thawed split floods only when pressure returns, which is why vacation floods are discovered on the doormat.
A pipe froze anyway, now what?
No water at one fixture in a freeze means ice somewhere on its line. Keep the faucet open, warm the suspect run with a hair dryer or heat, never a torch, and watch for leaks as flow returns. If it does not return, or you find a split: main off and call 801-874-8479. Emergency detail at 24/7 emergency plumber and what to do first.
Expert-reviewed by Utah Service Pros. Last updated June 2026.
Questions about frozen pipe prevention? Call Utah Service Pros at 801-874-8479 for straight answers and a flat-rate quote.