Pipe Freeze Risk Checker

Denver drops to 32°F or below on about 146 days in a typical year. Pick your town and the spot where your pipes run, and the checker tells you how exposed they are on a cold night.

You get a risk level and the steps that help before a cold night.

Where do the pipes run?

How the risk level is set

We look at two things. The first is the average January low where you live, taken from ten years of daily weather. The second is where the pipes run. Pipes in an attic, a crawl space or a garage lose heat faster than pipes in a heated inside wall, and pipes on an outside wall or an outdoor spigot are the most exposed.

Each one adds points. A low score reads as low risk. Higher scores read as moderate, high or severe.

What the result means

Each town in the picker has an average January low between 18°F and 20°F, so the climate half of the score lands at or close to its top step everywhere. That leaves the pipe location to decide the result. A line inside a heated wall reads lower than one crossing a crawl space or a garage, and an outdoor spigot reads highest of all.

An average is a typical figure and not a forecast. A single cold night can be colder than the January average, so the steps in the result are worth doing once and leaving in place.

What helps before a freeze

Know where the main water shut-off valve is. Drain and disconnect garden hoses and cover outdoor spigots before the first freeze. Insulate pipes in unheated spaces. On a freezing night, a slight drip at a faucet and open cabinet doors on outside walls help. If you will be away, keep the heat on or have the plumbing drained. A plumber can look at any run you are unsure about.

Common questions

How cold does it get for pipes in Denver?

January nights in Denver average 19°F, and the city has about 146 days a year at or below freezing. Spigots on outside walls, pipes in a garage or crawl space and lines in rooms nobody heats are the first to freeze. The picker gives the figure for each town.

At what temperature do pipes freeze?

Water freezes at 32°F, but a pipe needs several hours of cold to freeze through. Pipes in an unheated space or on an outside wall are the first to go.

Should I leave a faucet dripping on a freezing night?

A slight drip keeps water moving through the pipe, and opening cabinet doors lets warm air reach pipes under sinks on outside walls. Both are simple steps for a night that drops below freezing.

Where is my main water shut-off valve?

It is usually where the water line enters the house, in a garage, a utility room or on an outside wall near the meter. Find it before you need it, and make sure everyone in the house knows where it is.

What if I am away during a freeze?

Keep the heat on at 55°F or higher, or have the plumbing drained before you leave. A plumber can drain the system and tell you how to bring it back.

Climate figures: Daymet daily data 2015 to 2024 for each place.

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Call (855) 321-3426