Frozen Pipes in Winnipeg: Prevent & Thaw

Frozen pipes are a Manitoba reality every winter. The good news: a frozen pipe is fixable. The bad news: 1 in 4 frozen pipes burst, and a single burst can release 250 gallons of water before someone notices. Here's how to prevent them, what to do if you find one, and when to stop trying and call a Winnipeg plumber.

Prevention. The pipes most likely to freeze in Winnipeg homes are: outdoor hose bibs (sillcocks), pipes in unheated garage walls, pipes in exterior wall cavities (especially north-facing walls), basement rim-joist pipes, and crawl space lines. Before winter: drain and disconnect garden hoses, shut off and drain the indoor valve feeding the hose bib, insulate any exposed pipes in unheated spaces, and seal exterior wall penetrations against draft.

In a Manitoba cold snap (-25°C or colder), let cold-water faucets on exterior walls trickle overnight. Moving water is far harder to freeze than still water. Open cabinet doors under exterior-wall sinks to let warm room air reach the pipes. Keep the furnace running even when away — programming a 'vacation' setback below 16°C is asking for trouble in February.

If you find a frozen pipe (no water flow from a fixture, frost on the pipe surface, a bulging section): step one, shut off the main water valve immediately. A frozen pipe that has not yet burst can still burst the moment it thaws if there's an ice plug downstream and pressure has nowhere to go. Step two, open the fixture so thawing water has an exit.

Safe thawing methods: a hairdryer on low, applied to the pipe (not the wall) starting from the fixture side and working toward the frozen section. A heat gun (carefully). Towels soaked in hot water wrapped around the pipe. Cranking the room temperature with the furnace. Never use a propane torch, never use an open flame, never use a salamander heater — pipe fires inside finished walls are a real and regular Winnipeg insurance claim.

If you can't access the frozen section (it's inside a wall, a slab, or a buried line) or if the pipe has already burst: call a Winnipeg plumber. Professional pipe thawing uses an electrical thawing machine that passes a low-voltage current through the pipe to thaw from the inside out — fast, controlled and safe. Burst-pipe repair gets done in the same visit.