Look for cold drafts
Check in unheated areas where water supply lines are located. Usual locations include: basements, crawl spaces, attics, garages, and under kitchen and bathroom cabinets.
Seal your home from winter
Repair broken windows, check doors and insulate areas that allow cold exterior air to enter.
Both hot and cold water pipes should be insulated in cold areas. Consider installing specific products made to insulate water pipes, like a pipe sleeve, or installing UL-listed heat tape, heat cable or similar materials.
Open interior doors and cabinets
Allow heat from the house to warm unprotected pipes in cold basements and similar areas.
Keep the heat on
Keep your thermostat set for at least 15°C. If away for extended absences, refer to your home insurance policy on how often someone should be checking your home / monitoring for freezing.
Winterize outside faucets and other water features
Make sure the water line to outside faucets, garden hoses, pools or decorative water features is turned off, disconnected, and drained. If these lines freeze, they can burst which may cause water to drain into your home.
Check your hot water tank
If your hot water tank is located in a maintenance room outside of your home, make sure the area is adequately heated.
Regularly run water through pipes
Regularly run water in your pipes through everyday use, or by continuously running a steady pencil-width stream of water. You will be responsible for any increase in water charges unless you receive an official notice from The City of Calgary.