Depending on where you live in the country, frozen pipes may catch you by surprise. In the West and South, bone-chilling freezing temperatures are fairly uncommon. A home owner may be caught unawares during a harsh cold spell and could end up with broken and burst pipes. useful article
Freezing puts pipes into jeopardy because water increases in volume as it freezes. The water itself “stretches out” the pipes and when the pipes and water thaws, the joints in the pipes may have holes or could just burst entirely. The now-thawed water may rush through your kitchen or bathroom, damaging the flooring and walls and making expensive repairs necessary.
Insulate your pipes
Keep your pipes warmer by insulating them. Pipes exposed in attics and under the house are more likely to freeze in chilly weather. Simple pipe insulation is readily available at any home improvement store for affordable prices. Wrap your pipes well to help protect them from the winter cold.
Let your faucets “leak”
On a very cold night, turn your kitchen and bathroom faucets on and allow the water to trickle. Running water does not freeze as quickly as still water. Compare a standing lake and a water fall for example. Lakes ice over quickly whereas it takes severe cold to freeze a water fall. Let your water move through the pipes to keep it from freezing.
Keep your house warm
If you shut off portions of your house in the winter to manage your valuable heat or if you turn off your heat entirely when you leave for vacation, use a different strategy on very cold nights. All parts of your house should be kept to about 55 degrees if possible.
Drain your lines
To solve the problem entirely, let your plumbing lines drain. If your pipes have no water in them to start with, there is no water to freeze and bust your pipes. Shut the water off at the main line and drain the water out of the lines. Run the faucet in a bathtub until there is no water left and then find a faucet outside on the lowest point on your property (if relevant) and drain the remaining water out of the pipes there.