Why Pipes Freeze

11/1/2023 (Permalink)

If your pipes are exposed to temperatures below 32 degrees Fahrenheit for an extended period of time, the water can freeze and cause extensive damage to your home. This can be avoided!

Frozen pipes can occur for two basic reasons:

1. Installation of pipes in an unheated space without adequate protection
2. Insufficient heat in the area of the freeze

What types of pipes are susceptible this situation? Domestic water piping, HVAC heating and cooling piping and sprinkler piping are all vulnerable if left in cold and unprotected conditions as stated above. Plastic and metal pipes can burst when they freeze, and depending on the size of the pipe, even a small crack in a burst pipe can spew hundreds or even thousands of gallons of water in a day.

Why does a pipe burst, anyway? Well, when water freezes, it expands. The ice expansion will exert pressure against the pipe wall but also pressurizes the water trapped between the ice and a closed valve or fixture. As the water continues to freeze and expand inside the pipe, it causes the trapped water to continue to increase in pressure, thus, just as a can of soda will burst in your freezer, so does your water pipe.

Some common locations where pipes will freeze are outdoor hose bibs, swimming pool supply lines, fire sprinkler lines and water supply pipes in unheated interior areas. These areas include basements, crawlspaces, attics, garages, bathroom sink cabinets and kitchen cabinets. Pipes along exterior walls that have little or no insulation, voids in the insulation or improperly installed building wrap are subject to freezing. You might want to check in on that sooner rather than later. Review the International Plumbing Code by clicking here.

With any questions or if your home has been water-damaged, call SERVPRO® on our 24/7 Emergency Service line, (502) 897-3608.