What you need to know if your pipes freeze

IDAHO FALLS — Subzero temperatures have hit eastern Idsho again this weekend. The Idaho Falls Water Division has offered information and tips for property owners and tenants to prepare for the potential of frozen water lines.

“Waterlines in Idaho Falls are generally buried between five to six feet deep, keeping them below the winter frost line. As temperatures drop below freezing, frost penetrates into the ground,” Water Superintendent Dave Richards explained. “During extended periods of extreme cold, frost can penetrate more than seven feet deep, causing serious problems for underground utilities, especially waterlines.”

As water freezes, it expands in size, stopping the water flow and possibly causing waterlines to split or rupture. Frozen water lines usually occur where they’re exposed to cold temperatures, such as when they enter the basement or crawlspace. Additionally, smaller waterlines, such as those running from the street to properties, are more prone to freezing.

Call the Idaho Falls Water Division at (208) 612-8471 to ensure service isn’t temporarily disrupted if you have reduced or no water flow and the property is within Idaho Falls city limits. If the flow is reduced, allow cold water to run to thaw a partially frozen line.

If there is no flow to any indoor faucets, the waterline may be frozen.

Tenants living in an apartment or rental property are encouraged to check with their landlord to verify work that could impact water service isn’t being performed nearby. Those living in a single-family residence should double-check water valves inside the home to ensure they are completely open and haven’t been tampered with, including valves near water heaters and softeners. If all valves are open, the waterline is most likely frozen.

When trying to thaw the line, do not use a torch. Applying too much heat too fast can cause the ice inside the pipe to fracture and rupture, resulting in flooding. Instead, use a hairdryer or rags soaked in warm water to gradually warm the frozen pipe until a bit of water flow is restored at a faucet.

Once flow is restored, allow the faucet’s cold water to run until the frozen section is thawed and full flow is restored. Leave a trickle of cold water running to prevent the line from freezing again, especially if adding protection to the frozen section isn’t possible. If you need help with how to proceed, contact a licensed plumber.

In the event of an emergency or even minor waterline repairs, it is beneficial for everyone in the home to know the location of the master shut-off valve and how to operate it, water officials said. The master shut-off valve is typically located where the waterline enters the home, most likely in a mechanical room, basement or crawlspace. If you have a finished basement and cannot find the valve, it may have been covered by a basement wall. Check to make sure the valve operates freely and is easily accessible.